Make the timeout minutes longer for CI

Author: mitmul

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on: [push]
 jobs:
   mlx-test:
     runs-on: macos-latest
-    timeout-minutes: 10
+    timeout-minutes: 30
     strategy:
       matrix:
         python-version: ['3.10', '3.11', '3.12', '3.13']