Fix CQS signal facebook-folly-split-usage-check in fbcode/torchrec/inference (#3392)

Summary: Pull Request resolved: #3392

Differential Revision: D83128192

fbshipit-source-id: 39212525f6819e7586475bb96ef2bb370a5df204

Author: generatedunixname89002005287564

torchrec/inference/inference_legacy/src/SingleGPUExecutor.cpp

@@ -143,7 +143,7 @@ void SingleGPUExecutor::process() {
           &manager_->allInstances().at(execInfo.interpIdx));
 
       std::vector<std::string> names;
-      folly::split(".", submodulePath, names);
+      folly::split('.', submodulePath, names);
       auto m = I.fromMovable(execInfo.model);
       for (const auto& name : names) {
         if (name == "") {