Fix assign-issue-owners workflow (open-telemetry#2076)

Author: trask

.github/workflows/assign-issue-owners.yml

@@ -19,6 +19,9 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
 
+      - name: Install js-yaml
+        run: npm install js-yaml
+
       - name: Parse component label and assign owners
         uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7.0.1
         with: