Fix TestMinioStorageIterator skip message (#24765)

Followup to https://github.com/go-gitea/gitea/pull/24762, fix this
message.

modules/storage/minio_test.go

@@ -10,7 +10,7 @@ import (
 
 func TestMinioStorageIterator(t *testing.T) {
 	if os.Getenv("CI") == "" {
-		t.Skip("minioStorage not present on CI")
+		t.Skip("minioStorage not present outside of CI")
 		return
 	}
 	testStorageIterator(t, string(MinioStorageType), MinioStorageConfig{