Increase timeout for Unity build workflow to 25 minutes

Author: StephenHodgson

.github/workflows/unity-build.yml

@@ -21,7 +21,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     permissions:
       contents: read
-    timeout-minutes: 15
+    timeout-minutes: 25
     steps:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4