ci: missing ::add-path::

Author: Jarsop

.github/workflows/workflow.yml

@@ -117,7 +117,7 @@ jobs:
         if: runner.os == 'macOS'
         run: |
           brew install gnu-tar
-          echo "::add-path::/usr/local/opt/gnu-tar/libexec/gnubin"
+          echo "/usr/local/opt/gnu-tar/libexec/gnubin" >> $GITHUB_PATH
 
       # Cache files between builds
       - name: Setup | Cache Cargo