ci(modal): extend GPU test timeout

Five serial Python GPU suites need more than 10 minutes on T4.

Author: ggeorgakoudis

.github/workflows/build-upload-wheels.yml

@@ -162,13 +162,13 @@ jobs:
         run: |
           python -m pip install modal==1.5.3
           set +e
-          timeout --signal=TERM --kill-after=30s 10m \
+          timeout --signal=TERM --kill-after=30s 20m \
             modal run --timestamps buildscripts/modal/test_gpu.py
           modal_status=$?
           set -e
 
           if [[ $modal_status -eq 124 ]]; then
-            echo "::error::Modal GPU tests exceeded the 10-minute timeout"
+            echo "::error::Modal GPU tests exceeded the 20-minute timeout"
             exit 1
           fi
           exit "$modal_status"