fix: use GITHUB_ACTION_PATH instead of github.action_path

${{github.action_path}} is not compatible with container based actions.
${{github.workspacei}} suffers from the same defect, and it is unlikely that
 github is going to fix it, as it has been a known issue for a long time.
See actions/checkout#785

The solution is to use ${{env.GITHUB_ACTION_PATH}} instead, or inside
a run context, just $GITHUB_ACTION_PATH

Author: joshua-clayton

action.yml

@@ -62,7 +62,7 @@ runs:
       shell: bash
 
     - id: install
-      run: ${{ github.action_path }}/install.sh
+      run: ${GITHUB_ACTION_PATH}/install.sh
       shell: bash
 
     - run: echo Running cocogitto
@@ -76,7 +76,7 @@ runs:
     - id: cog
       shell: bash
       run: |
-        ${{ github.action_path }}/cog.sh \
+        ${GITHUB_ACTION_PATH}/cog.sh \
         "${{ inputs.check }}" \
         "${{ inputs.check-latest-tag-only }}" \
         "${{ inputs.release }}" \