Mark /github/workspace as safe directory (#12590)

* Mark /github/workspace as safe directory

* Cleanup unexpected files

Author: puneetbehl

.github/actions/post-release/entrypoint.sh

@@ -33,6 +33,7 @@ echo ::set-output name=next_version::${next_version}
 echo "Configuring git"
 git config --global user.email "$GIT_USER_EMAIL"
 git config --global user.name "$GIT_USER_NAME"
+git config --global --add safe.directory /github/workspace
 git fetch
 
 echo -n "Determining target branch: "

.github/actions/pre-release/entrypoint.sh

@@ -16,6 +16,7 @@ fi
 echo "Configuring git"
 git config --global user.email "$GIT_USER_EMAIL"
 git config --global user.name "$GIT_USER_NAME"
+git config --global --add safe.directory /github/workspace
 git fetch
 
 echo -n "Determining target branch: "