chore(deps): update dependency pygithub to v2.8.1 (#239)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

requirements.txt

@@ -18,7 +18,7 @@ idna==3.10
     # via requests
 pycparser==2.22
     # via cffi
-pygithub==2.7.0
+pygithub==2.8.1
     # via ol-concourse-github-issues
 pyjwt==2.10.1
     # via pygithub