Correct typing for Commit.get_comments() (PyGithub#1765)

Commit.get_comments() returns a PaginatedList of CommitComment
instances, not commits.

Co-Authored-By: Raju Subramanian <[email protected]>

Author: s-t-e-v-e-n-k

github/Commit.pyi

@@ -42,7 +42,7 @@ class Commit(CompletableGithubObject):
     @property
     def files(self) -> List[File]: ...
     def get_combined_status(self) -> CommitCombinedStatus: ...
-    def get_comments(self) -> PaginatedList[GitCommit]: ...
+    def get_comments(self) -> PaginatedList[CommitComment]: ...
     def get_statuses(self) -> PaginatedList[CommitStatus]: ...
     def get_check_runs(
         self,