CI: Pin miniconda version
xref #17696 


# [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=h1) Report
> Merging [#17700](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/f9d88cd6b3543bbb678378fc4fe736f13497d21e?src=pr&el=desc) will **decrease** coverage by `0.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17700/graphs/tree.svg?width=650&token=eZ4WkYLtcO&height=150&src=pr)](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17700      +/-   ##
==========================================
- Coverage   91.27%   91.25%   -0.02%     
==========================================
  Files         163      163              
  Lines       49760    49760              
==========================================
- Hits        45416    45407       -9     
- Misses       4344     4353       +9
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.04% <ø> (ø)` | :arrow_up: |
| #single | `40.34% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.73% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=footer). Last update [f9d88cd...09d8a74](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=h1) Report
> Merging [#17700](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/f9d88cd6b3543bbb678378fc4fe736f13497d21e?src=pr&el=desc) will **decrease** coverage by `0.01%`.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/17700/graphs/tree.svg?token=eZ4WkYLtcO&src=pr&height=150&width=650)](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree)

```diff
@@            Coverage Diff             @@
##           master   #17700      +/-   ##
==========================================
- Coverage   91.27%   91.25%   -0.02%     
==========================================
  Files         163      163              
  Lines       49760    49760              
==========================================
- Hits        45416    45407       -9     
- Misses       4344     4353       +9
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `89.04% <ø> (ø)` | :arrow_up: |
| #single | `40.34% <ø> (-0.07%)` | :arrow_down: |

| [Impacted Files](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree) | Coverage Δ | |
|---|---|---|
| [pandas/io/gbq.py](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree#diff-cGFuZGFzL2lvL2dicS5weQ==) | `25% <0%> (-58.34%)` | :arrow_down: |
| [pandas/core/frame.py](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=tree#diff-cGFuZGFzL2NvcmUvZnJhbWUucHk=) | `97.73% <0%> (-0.1%)` | :arrow_down: |

------

[Continue to review full report at Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=continue).
> **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta)
> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
> Powered by [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=footer). Last update [f9d88cd...7bc883e](https://codecov.io/gh/pandas-dev/pandas/pull/17700?src=pr&el=lastupdated). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments).
 btw the last time I had to do this I put the things that I would later revert in a specific commit so it was easy. (so create an issue to revert this when conda is fixed) OK, hopefully that commit does it.

When I revert this, I'll add another commit that keeps

- fix the beautifulsoup4 package name
- fix the bzip2 skip if it's not available thanks @TomAugspurger can fixup if needed later. let's open an issue to track this & revert when we can. 