Update issue-opened.yml (#2744)

Address Missing pinned container image hash for GitHub Actions configuration

Author: iBrandyJackson

.github/workflows/issue-opened.yml

@@ -17,7 +17,7 @@ jobs:
   oncall_review_assigner:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/setup-node@v4
+    - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 #v4.4.0
     - run: npm install @pagerduty/pdjs
     - uses: actions/github-script@e69ef5462fd455e02edcaf4dd7708eda96b9eda0 # v7.0.0
       env: