use github.action_path for requirements.txt

Author: mathause

action.yaml

@@ -16,7 +16,7 @@ runs:
     - name: install dependencies
       shell: bash -l {0}
       run: |
-        python -m pip install -r requirements.txt
+        python -m pip install -r ${{ github.action_path }}/requirements.txt
     - name: analyze environments
       shell: bash -l {0}
       env: