fix: pragma gcc

Author: baszalmstra

cpp/tests/solve.cpp

@@ -156,7 +156,7 @@ struct PackageDatabase : public resolvo::DependencyProvider {
 
 #ifdef __GNUC__
 #pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Werror=unused-but-set-variable"
+#pragma GCC diagnostic ignored "-Wunused-but-set-variable"
 #endif
 
 SCENARIO("Solve") {