Update PHP version for Coveralls

Author: kenjis

src/Template/.github/workflows/phpunit.yml

@@ -65,7 +65,7 @@ jobs:
           TERM: xterm-256color
           TACHYCARDIA_MONITOR_GA: enabled
 
-      - if: matrix.php-versions == '8.0'
+      - if: matrix.php-versions == '8.1'
         name: Run Coveralls
         continue-on-error: true
         run: |