Preview branch without a branch shouldn't log an error, it's a user provided issue

Author: matt-aitken

apps/webapp/app/models/runtimeEnvironment.server.ts

@@ -37,7 +37,7 @@ export async function findEnvironmentByApiKey(
 
   if (environment.type === "PREVIEW") {
     if (!branchName) {
-      logger.error("findEnvironmentByApiKey(): Preview env with no branch name provided", {
+      logger.warn("findEnvironmentByApiKey(): Preview env with no branch name provided", {
         environmentId: environment.id,
       });
       return null;