chore(ci): set cluster pin timeout to 30m

https://github.com/ipfs/ipfs-webui/actions/workflows/ci.yml?page=4&query=is%3Asuccess 
are usually under 10-20 minutes
if something takes longer it will likely take ages and then fail, 
so better to fail faster, allowing user to retry release

.github/workflows/ci.yml

@@ -135,6 +135,7 @@ jobs:
           CLUSTER_USER: ${{ secrets.CLUSTER_USER }}
           CLUSTER_PASSWORD: ${{ secrets.CLUSTER_PASSWORD }}
           PIN_NAME: "ipfs-webui@${{ github.sha }}"
+        timeout-minutes: 15
 
       - name: Fail job due to pinning failure
         # only fail if pinning failed for main commits