Fixes script to pull the correct sha

Signed-off-by: Darshit Chanpura <[email protected]>

.github/workflows/apply-issue-labels-to-pr.yml

@@ -1,18 +1,15 @@
-name: Apply issue labels to PR
+name: Apply all issue labels to PR
 
 on:
+  pull_request:
   pull_request_target:
-    types: [opened, reopened, synchronize, converted_to_draft, edited]
-  check_suite:
-    types: [ requested, rerequested, completed ]
 
 jobs:
   mirror-labels-to-pr:
-#    if: github.repository == 'opensearch-project/OpenSearch'
+    #    if: github.repository == 'opensearch-project/OpenSearch'
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout repo
-        uses: actions/checkout@v3
+      - uses: actions/checkout@v3
 
       - name: Run label script
-        run: ../../.github-automation/copy-issue-labels-to-pr.py ${{ secrets.GITHUB_TOKEN }} $GITHUB_REPOSITORY $GITHUB_EVENT_PATH
+        run: pip install PyGithub && .github/copy-issue-labels-to-pr.py ${{ secrets.GITHUB_TOKEN }} $GITHUB_REPOSITORY $GITHUB_EVENT_PATH