GitHub Actions: replace broken 1.17 workflow with 1.23 for now

(With 1.17.13, the tests would not even compile.)

Author: stapelberg

.github/workflows/test.yml

@@ -230,10 +230,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        # https://github.com/golang/go/issues/55078
-        # golang.org/x/sys/unix broke on Go versions before 1.17. Not worth
-        # fixing.
-        gover: ['1.17.13']
+        # TODO: switch to an older Go version once tests are made compatible
+        gover: ['1.23']
     env:
       PYTHONDONTWRITEBYTECODE: x
       GOPATH: ${{github.workspace}}