Increase timeout to 240 min and swap to 6GB

With 4GB swap, STA thrashes and P&R exceeded the 120-min timeout.
Increase swap to 6GB (compromise between disk space and RAM) and
bump timeout to 240 min to accommodate the slower STA phase.

Co-developed-by: Claude Code v2.1.44 (claude-opus-4-6)

Author: robtaylor

.github/workflows/mcu-soc-rebuild.yml

@@ -19,7 +19,7 @@ jobs:
   rebuild:
     name: Rebuild MCU SoC Test Data
     runs-on: ubuntu-latest
-    timeout-minutes: 180
+    timeout-minutes: 240
     steps:
       - name: Free disk space
         run: |
@@ -31,7 +31,7 @@ jobs:
         run: |
           sudo swapoff /swapfile 2>/dev/null || true
           sudo rm -f /swapfile
-          sudo fallocate -l 8G /swapfile
+          sudo fallocate -l 6G /swapfile
           sudo chmod 600 /swapfile
           sudo mkswap /swapfile
           sudo swapon /swapfile