CI: increase buildusd Windows job timeout to 180 minutes

This allows the Windows build to complete while we investigate why the build time has ballooned recently and test ways to work around the slowdown.

(Internal change: 2406025)

Author: tlewis

.github/workflows/buildusd.yml

@@ -237,7 +237,7 @@ jobs:
       contents: write # Grant write permissions in order to upload artifacts
     env:
       PYTHON_VERSION: "3.9"
-    timeout-minutes: 120
+    timeout-minutes: 180
     steps:
       - name: Checkout code
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 #v4.3.1