ci: update github actions to go 1.26

Use the latest version of Go in the github actions.
Support for both Go 1.25 and 1.26 is still available,
this only affects the version used by the CI.

Signed-off-by: Travis Nielsen <tnielsen@redhat.com>

.github/workflows/codegen.yml

@@ -36,7 +36,7 @@ jobs:
 
       - uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6.4.0
         with:
-          go-version: "1.25"
+          go-version: "1.26"
 
       - name: run codegen
         run: GOPATH=$(go env GOPATH) make codegen