ci: Use Ubuntu 22.04 instead of latest.

Author: freezy

.github/workflows/build.yml

@@ -21,9 +21,9 @@ jobs:
             rid: osx
           - os: macos-latest
             rid: ios-arm64
-          - os: ubuntu-latest
+          - os: ubuntu-22.04
             rid: linux-x64
-          - os: ubuntu-latest
+          - os: ubuntu-22.04
             rid: android-arm64-v8a
     steps:
       - uses: actions/checkout@v4