Use ISSUE_NUMBER env var for check support workflow

.github/workflows/issue-check-support.yml

@@ -44,11 +44,12 @@ jobs:
         uses: actions/github-script@v6
         with:
           script: |
+            issue_number = process.env.ISSUE_NUMBER
             body = process.env.COMMENT_BODY
             body = body.replace(/\\n/g, '\n')
             github.rest.issues.createComment({
               owner: context.repo.owner,
               repo: context.repo.repo,
-              issue_number: context.issue.number || github.event.inputs.issue_number,
+              issue_number,
               body
             });