chore: update go postprocessor version (#11493)

We need to pin the go version used for creating modules in the
postprocessor. If it is not pinned the latest is assumed -- which
will go out of date each time a new version of Go is released.

internal/postprocessor/main.go

@@ -45,7 +45,7 @@ const (
 	// This is the default Go version that will be generated into new go.mod
 	// files. It should be updated every time we drop support for old Go
 	// versions.
-	defaultGoModuleVersion = "1.22"
+	defaultGoModuleVersion = "1.22.7"
 )
 
 var (