TUN-6937: Bump golang.org/x/* packages to new release tags

vendor/golang.org/x/tools/imports/forward.go

@@ -40,7 +40,7 @@ var LocalPrefix string
 //
 // Note that filename's directory influences which imports can be chosen,
 // so it is important that filename be accurate.
-// To process data ``as if'' it were in filename, pass the data as a non-nil src.
+// To process data “as if” it were in filename, pass the data as a non-nil src.
 func Process(filename string, src []byte, opt *Options) ([]byte, error) {
 	var err error
 	if src == nil {