DOC: Fixed contributors for bugfix releases
Previously we showed just contributors who manually backported commits
to the maintenance branch.

```
Contributors
============

A total of 8 people contributed patches to this release.  People with a
"+" by their names contributed a patch for the first time.

* Daniel Saxton
* Joris Van den Bossche
* MeeseeksMachine
* MomIsBestFriend
* Pandas Development Team
* Simon Hawkins
* Tom Augspurger
* jbrockmendel
```

Fixed

```
Contributors
============

A total of 22 people contributed patches to this release.  People with a
"+" by their names contributed a patch for the first time.

* Anna Daglis +
* Daniel Saxton
* Irv Lustig
* Jan Škoda +
* Joris Van den Bossche
* Justin Zheng +
* Kaiqi Dong
* Kendall Masse +
* Marco Gorelli
* Matthew Roeschke +
* Pedro Reys +
* Prakhar Pandey +
* Robert de Vries +
* Rushabh Vasani +
* Simon Hawkins +
* Stijn Van Hoey +
* Terji Petersen +
* Tom Augspurger
* William Ayd
* alimcmaster1
* gfyoung +
* jbrockmendel
```

Closes https://github.com/pandas-dev/pandas/issues/31717
I guess this will need some more thought. As written, it only works when both the current and previous releases were bugfix releases.

I think we'll want to do both approaches (old and new) and then take the union. New version (for v1.0.1..v1.0.2)

```
Contributors
============

A total of 25 people contributed patches to this release.  People with a
"+" by their names contributed a patch for the first time.

* Anna Daglis +
* Daniel Saxton
* Irv Lustig
* Jan Škoda
* Joris Van den Bossche
* Justin Zheng
* Kaiqi Dong
* Kendall Masse
* Marco Gorelli
* Matthew Roeschke
* MeeseeksMachine
* MomIsBestFriend
* Pandas Development Team
* Pedro Reys +
* Prakhar Pandey
* Robert de Vries +
* Rushabh Vasani
* Simon Hawkins
* Stijn Van Hoey
* Terji Petersen
* Tom Augspurger
* William Ayd
* alimcmaster1
* gfyoung
* jbrockmendel
``` > #31215 was one where the user specifically asked about this, though I don't see them on the list. Any idea what we may be missing there?

I posted the output for 1.0.1..1.0.2, that commit was in 1.0 (but backported during the RC period IIRC). I've confirmed that their name is in the output for v0.25.3..v1.0.0. sure. you tagged for 1.04 ? Yeah, Joris did. So @pandas-dev/pandas-core when you merge PRs made by the backport bot, make sure to keep the text "Co-Authored by ...". Then the original author will be listed in the "Contributors" section of the 1.0.x docs.