build(deps): bump pygithub in /.github/actions/pr_notifier

Bumps [pygithub](https://github.com/pygithub/pygithub) from 1.58.2 to 2.4.0.
- [Release notes](https://github.com/pygithub/pygithub/releases)
- [Changelog](https://github.com/PyGithub/PyGithub/blob/main/doc/changes.rst)
- [Commits](PyGithub/PyGithub@v1.58.2...v2.4.0)

---
updated-dependencies:
- dependency-name: pygithub
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/actions/pr_notifier/requirements.txt

@@ -171,9 +171,9 @@ pycparser==2.20 \
     --hash=sha256:2d475327684562c3a96cc71adf7dc8c4f0565175cf86b6d7a404ff4c771f15f0 \
     --hash=sha256:7582ad22678f0fcd81102833f60ef8d0e57288b6b5fb00323d101be910e35705
     # via cffi
-pygithub==1.58.2 \
-    --hash=sha256:1e6b1b7afe31f75151fb81f7ab6b984a7188a852bdb123dbb9ae90023c3ce60f \
-    --hash=sha256:f435884af617c6debaa76cbc355372d1027445a56fbc39972a3b9ed4968badc8
+pygithub==2.4.0 \
+    --hash=sha256:6601e22627e87bac192f1e2e39c6e6f69a43152cfb8f307cee575879320b3051 \
+    --hash=sha256:81935aa4bdc939fba98fee1cb47422c09157c56a27966476ff92775602b9ee24
     # via -r requirements.in
 pyjwt[crypto]==2.4.0 \
     --hash=sha256:72d1d253f32dbd4f5c88eaf1fdc62f3a19f676ccbadb9dbc5d07e951b2b26daf \
@@ -211,10 +211,16 @@ slack-sdk==3.21.3 \
     --hash=sha256:20829bdc1a423ec93dac903470975ebf3bc76fd3fd91a4dadc0eeffc940ecb0c \
     --hash=sha256:de3c07b92479940b61cd68c566f49fbc9974c8f38f661d26244078f3903bb9cc
     # via -r requirements.in
+typing-extensions==4.12.2 \
+    --hash=sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d \
+    --hash=sha256:1a7ead55c7e559dd4dee8856e3a88b41225abfe1ce8df57b7c13915fe121ffb8
+    # via pygithub
 urllib3==1.26.6 \
     --hash=sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4 \
     --hash=sha256:f57b4c16c62fa2760b7e3d97c35b255512fb6b59a259730f36ba32ce9f8e342f
-    # via requests
+    # via
+    #   pygithub
+    #   requests
 wrapt==1.12.1 \
     --hash=sha256:b62ffa81fb85f4332a4f609cab4ac40709470da05643a082ec1eb88e6d9b97d7
     # via deprecated