maint: use issue number and not PR number in workflows triggered by comments

Signed-off-by: Yury V. Zaytsev <[email protected]>

Author: zyv

Diff for: .github/workflows/command-approve.yml

@@ -47,7 +47,7 @@ jobs:
     steps:
       - run: |
           gh pr review \
-            ${{ inputs.issue_number != '' && inputs.issue_number || github.event.pull_request.number }}  \
+            ${{ inputs.issue_number != '' && inputs.issue_number || github.event.issue.number }}  \
               --approve
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}