Update .github/workflows/tests.yml

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: i-am-that-guy

.github/workflows/tests.yml

@@ -19,7 +19,7 @@ jobs:
           bun-version: '1.2.18'    # or pin to whatever Bun version you need
 
       - name: Cache Bun dependencies
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ~/.bun