Fix Linux CI, bump to Ubuntu 22.04

Author: retrixe

.github/workflows/go.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-latest, windows-latest]
+        os: [ubuntu-22.04, macos-latest, windows-latest]
     steps:
     - name: Check out code into the Go module directory
       uses: actions/checkout@v4