Set timeout for build GH workflow jobs

This is in order to catch and stop any malfunctioning job.

.github/workflows/build.yml

@@ -12,6 +12,7 @@ jobs:
     build-linux-clang:
         name: Linux (Clang)
         runs-on: ubuntu-latest
+        timeout-minutes: 4
         env:
             CC: clang
             CFLAGS: -Werror
@@ -50,6 +51,7 @@ jobs:
     build-macos-clang:
         name: macOS (Clang)
         runs-on: macos-latest
+        timeout-minutes: 4
         env:
             CFLAGS: -Werror
             MACOSX_DEPLOYMENT_TARGET: 10.8
@@ -75,6 +77,7 @@ jobs:
     build-windows-vs2022:
         name: Windows (VS2022)
         runs-on: windows-latest
+        timeout-minutes: 4
         env:
             CFLAGS: /WX
         steps: