ci: bump timeout to 30 minutes

The builders are too unpredictable to always finish within 10 minutes

Author: Jonas Schievink

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ on:
 jobs:
   build:
     runs-on: ubuntu-latest
-    timeout-minutes: 10
+    timeout-minutes: 30
     continue-on-error: ${{ matrix.rust_version == 'nightly' }}
 
     steps: