fix: add search to reserved usernames (#9063)

* fix: add search to reserved usernames

* Update integrations/user_test.go

Co-Authored-By: 6543 <24977596+6543@users.noreply.github.com>

integrations/user_test.go

@@ -90,6 +90,7 @@ func TestRenameReservedUsername(t *testing.T) {
 		"repo",
 		"template",
 		"user",
+		"search",
 	}
 
 	session := loginUser(t, "user2")

models/user.go

@@ -822,6 +822,7 @@ var (
 		".",
 		"..",
 		".well-known",
+		"search",
 	}
 	reservedUserPatterns = []string{"*.keys", "*.gpg"}
 )