NO-ISSUE fix: if expression

.gitea/workflows/pr-title-check.yaml

@@ -15,9 +15,6 @@ jobs:
         run: |
           title="${{ gitea.event.pull_request.title }}"
           echo "Checking PR title: $title"
-          if [[ ! "$title" =~ '^(BLOG-[0-9]+|NO-ISSUE) [A-Z].+$' ]]; then
-            echo 'The title is not meet the format `BLOG-XXX Title title title`'
-            exit 1
-          else
-            echo 'Pass'
-          fi
+          echo "$title" | grep -qE '^(BLOG-[0-9]+|NO-ISSUE) [A-Z].+$' \
+            && echo 'Pass' \
+            || (echo 'The title is not meet the format `BLOG-XXX Title title title`'; exit 1)