Update action.yml use right standard

Author: WorkOfStan

action.yml

@@ -126,7 +126,7 @@ runs:
         if [ ${PHPCBF_EXIT_CODE} -ne 0 ]; then
           echo "::notice title=phpcbf wasn't idle::Non-zero code exit of phpcbf = ${PHPCBF_EXIT_CODE} ... phpcbf wasn't idle"
 
-          vendor/bin/phpcs --extensions="${{ inputs.extensions }}" . --standard="$use_standard" --ignore="${{ inputs.ignore }}" || MORE_ISSUES=true
+          vendor/bin/phpcs --extensions="${{ inputs.extensions }}" . --standard="${{ env.USE_STANDARD }}" --ignore="${{ inputs.ignore }}" || MORE_ISSUES=true
           # because of `||`, the previous command always exit 0
           if [ "${MORE_ISSUES}" = "true" ]; then
             echo "::warning title=Some phpcs issues remained.::Some phpcs issues remained. Manual fix necessary."