refactor: deprecated github output

Author: gtjamesa

.github/workflows/run-tests.yml

@@ -43,7 +43,8 @@ jobs:
 
       - name: Get Composer Cache Directory
         id: composer-cache
-        run: echo "::set-output name=dir::$(composer config cache-files-dir)"
+        run: |
+          echo "dir=$(composer config cache-files-dir)" >> $GITHUB_OUTPUT
 
       - name: Cache composer dependencies
         uses: actions/cache@v2