fix companion CI (calcom#25881)

Author: volnei

.github/workflows/companion-build.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           node-version: 20
           cache: npm
-          cache-dependency-path: companion/package-lock.json
+          cache-dependency-path: companion/bun.lock
       - name: Install dependencies
         working-directory: companion
         run: npm ci