[Bitbucket] Fixed Pull Requests Activities path

[roboqo]

Non existing API endpoint was used in the latest version, so this PR fixes that.

[codecov-commenter]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (26f450e) 34.35% compared to head (94d8475) 34.35%.

Files	Patch %	Lines
atlassian/bitbucket/__init__.py	0.00%	1 Missing :warning:

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1326 +/- ## ======================================= Coverage 34.35% 34.35% ======================================= Files 45 45 Lines 8302 8302 Branches 1158 1158 ======================================= Hits 2852 2852 Misses 5336 5336 Partials 114 114 ```

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[SkylerSalvato]

@roboqo @gonchik

Hi, my team uses this with the Bitbucket Server REST API, and the endpoint actually still uses activities. Would it be possible to implement this change specifically for Bitbucket Cloud, similar to the following?

https://github.com/roboqo/atlassian-python-api/blob/94d8475a445a5890258ff3049c149a8a7faa7ca4/atlassian/bitbucket/__init__.py#L1552-L1556

[SkylerSalvato]

See my proposed change here: #1336

[taniajtaniaj]

Hi, This change breaks our system. Our bitbucket supports "activities" but not "activity" ...

[SkylerSalvato]

Hi, This change breaks our system. Our bitbucket supports "activities" but not "activity" ...

I created PR #1336 that fixes this, and it was merged, but the version has not been released yet. Until it is released you should be able to pin to the last version (atlassian-python-api==3.41.9).

[gonchik]

@roboqo @taniajtaniaj I will publish a new release in a few hours

[taniajtaniaj]

thanks a lot! very much appreciated!!