CI/GHA: bump Go versions used

As of today, Go 1.23 is released and thus Go 1.21.x is no longer
supported.

Test against the two supported Go branches: 1.22.x and 1.23.x.

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

.github/workflows/test.yml

@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        go-version: [1.19.x, 1.20.x]
+        go-version: [1.22.x, 1.23.x]
         libseccomp: ["v2.3.3", "v2.4.4", "v2.5.5", "HEAD"]
 
     steps: