Merge pull request #4 from LucaTools/gha-path-fix

Use `$GITHUB_WORKSPACE` instead of `$PWD`

Author: albertodebortoli

action.yml

@@ -41,4 +41,4 @@ runs:
       shell: bash
       run: |
         luca install --spec=${{ inputs.spec }}
-        echo "$PWD/.luca/tools" >> $GITHUB_PATH
+        echo "$GITHUB_WORKSPACE/.luca/tools" >> $GITHUB_PATH