ci: update Ubuntu version for build-linux job to 22.04

Author: std-microblock

.github/workflows/rust.yml

@@ -32,7 +32,7 @@ jobs:
           ./target/release/aria2c.exe
           ./target/release/sciter.dll
   build-linux:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     steps:
     - name: Install dependencies
       run: |