fix CI issue

Author: unandyala

.github/workflows/test.yml

@@ -26,6 +26,10 @@ jobs:
         with:
           path: "**/node_modules"
           key: ${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('**/package-lock.json') }}
+      - name: Install oasdiff
+        run: |
+          curl -fsSL https://raw.githubusercontent.com/oasdiff/oasdiff/main/install.sh | sh
+          sudo mv ./bin/oasdiff /usr/local/bin/
       - run: npm ci
         if: ${{ steps.cache-nodemodules.outputs.cache-hit != 'true' }}
       - run: npm run compile