Added release notes v0.12.0 (#3711)

### What problem does this PR solve?


### Type of change


- [x] Documentation Update

docs/guides/upgrade_ragflow.mdx

@@ -11,7 +11,9 @@ Upgrade RAGFlow to `dev-slim`/`dev` or the latest, published release.
 
 ## Upgrade RAGFlow to `dev-slim`/`dev`, the most recent, tested Docker image
 
-`dev-slim` refers to the RAGFlow Docker image *without* embedding models, while `dev` refers to the RAGFlow Docker image with embedding models. For details on their differences, see **docker/.env**.
+`dev-slim` refers to the RAGFlow Docker image *without* embedding models, while `dev` refers to the RAGFlow Docker image with embedding models. For details on their differences, see [ragflow/docker/.env](https://github.com/infiniflow/ragflow/blob/main/docker/.env).
+
+To upgrade RAGFlow, you must upgrade **both** your code **and** your Docker image:
 
 1. Clone the repo
 
@@ -52,6 +54,8 @@ RAGFLOW_IMAGE=infiniflow/ragflow:dev
 
 ## Upgrade RAGFlow to the most recent, officially published release
 
+To upgrade RAGFlow, you must upgrade **both** your code **and** your Docker image:
+
 1. Clone the repo
 
    ```bash

docs/release_notes.md

@@ -24,14 +24,14 @@ Released on November 26, 2024.
 - Replaces Redis with Valkey.
 - Adds three new UI languages (*contributed by the community*): Indonesian, Spanish, and Vietnamese.
 
-### Compatability changes
+### Compatibility changes
 
 As of this release, **service_config.yaml.template** replaces **service_config.yaml** for configuring backend services. Upon Docker container startup, the environment variables defined in this template file are automatically populated and a **service_config.yaml** is auto-generated from it. [#3341](https://github.com/infiniflow/ragflow/pull/3341)
 
 This approach eliminates the need to manually update **service_config.yaml** after making changes to **.env**, facilitating dynamic environment configurations.
 
-:::danger
-Ensure that you [upgrade both your code and Docker image to this release](https://ragflow.io/docs/dev/upgrade_ragflow#upgrade-ragflow-to-the-most-recent-officially-published-release) before trying this new approach.
+:::danger IMPORTANT
+Ensure that you [upgrade **both** your code **and** Docker image to this release](https://ragflow.io/docs/dev/upgrade_ragflow#upgrade-ragflow-to-the-most-recent-officially-published-release) before trying this new approach.
 :::
 
 ### Related APIs
@@ -56,6 +56,10 @@ Ensure that you [upgrade both your code and Docker image to this release](https:
 
 ## v0.13.0
 
+Released on October 31, 2024.
+
+### New features
+
 - Adds the team management functionality for all users.
 - Updates the Agent UI to improve usability.
 - Adds support for Markdown chunking in the **General** chunk method.
@@ -78,4 +82,37 @@ pip install ragflow-sdk==0.13.0
 
 - [Acquire a RAGFlow API key](https://ragflow.io/docs/dev/acquire_ragflow_api_key)
 - [HTTP API Reference](https://ragflow.io/docs/dev/http_api_reference)
-- [Python API Reference](https://ragflow.io/docs/dev/python_api_reference)
+- [Python API Reference](https://ragflow.io/docs/dev/python_api_reference)
+
+## v0.12.0
+
+Released on September 30, 2024.
+
+### New features
+
+- Offers slim editions of RAGFlow's Docker images, which do not include built-in BGE/BCE embedding or reranking models.
+- Improves the results of multi-round dialogues.
+- Enables users to remove added LLM vendors.
+- Adds support for OpenTTS and SparkTTS models.
+- Implements an **Excel to HTML** toggle in the **General** chunk method, allowing users to parse an spreadsheet into either an HTML table or key-value pairs by row.
+- Adds agent tools **YahooFance** and **Jin10**.
+- Adds a template for an investment advisor agent.
+
+### Compatibility changes
+
+As of this release, RAGFlow offers slim editions of its Docker images to improve the experience for users with limited Internet access. A slim edition of RAGFlow's Docker image does not include built-in BGE/BCE embedding models and has a size of about 1GB; a full edition of RAGFlow is approximately 9GB and includes both built-in embedding models and embedding models that will be downloaded once you select them in the RAGFlow UI.
+
+The default Docker image edition is `dev-slim`. The following list clarifies the differences between various editions:
+
+- `dev-slim`: The slim edition of the most recent tested Docker image.
+- `v0.12.0-slim`: The slim edition of the most recent **officially released** Docker image.
+- `dev`: The full edition of the most recent tested Docker image.
+- `v0.12.0`: The full edition of the most recent **officially released** Docker image.
+
+See [Upgrade RAGFlow](https://ragflow.io/docs/dev/upgrade_ragflow) for instructions on upgrading.
+
+### Documentation
+
+#### Added documents
+
+- [Upgrade RAGFlow](https://ragflow.io/docs/dev/upgrade_ragflow)