chore(deps): pin oven-sh/setup-bun action to v2

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/qa.yml

@@ -90,7 +90,7 @@ jobs:
           slack_channel_id: ${{ env.SLACK_CHANNEL_ID }}
 
       - name: Setup Bun
-        uses: oven-sh/setup-bun@v2
+        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
         with:
           bun-version: latest