fix: optimization: PVS-Studio warning V836

Expression's value is copied at variable declaration.
The variable is never modified. Consider declaring it as a reference.

Changed variables to be a reference to avoid unnecessary copy.

Reported by: PVS-Studio

Signed-off-by: Vyacheslav Ivanov <islavaivanov76@gmail.com>

src/content/ContentLoader.cpp

@@ -85,7 +85,7 @@ bool ContentLoader::fixPackIndices(
             indexed.push_back(name);
         }
     }
-    for (auto name : detected) {
+    for (const auto &name : detected) {
         if (!util::contains(indexed, name)) {
             arr->put(name);
             modified = true;