fix(ci): bump cache key to bust stale tsgo

Author: edy

.github/actions/setup-bun/action.yml

@@ -28,9 +28,9 @@ runs:
       uses: actions/cache/restore@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
       with:
         path: ${{ steps.cache.outputs.dir }}
-        key: ${{ runner.os }}-bun-${{ hashFiles('**/bun.lock') }}
+        key: ${{ runner.os }}-bun-v2-${{ hashFiles('**/bun.lock') }}
         restore-keys: |
-          ${{ runner.os }}-bun-
+          ${{ runner.os }}-bun-v2-
 
     - name: Install dependencies (with retry)
       run: |