try_compile: Fix quotes in reporting of unknown arguments

In commit 6b427d8da9 (cmCoreTryCompile: Port to cmArgumentParser,
2022-08-01) we inadvertently dropped a matching quote during refactoring
of reporting unknown arguments given to try_compile/try_run.  Add the
missing quote to match the old behavior and not have an imbalanced quote
in the warning.

Source/cmCoreTryCompile.cxx

@@ -165,7 +165,7 @@ Arguments cmCoreTryCompile::ParseArgs(
       !unparsedArguments.empty()) {
     std::string m = "Unknown arguments:";
     for (const auto& i : unparsedArguments) {
-      m = cmStrCat(m, "\n  ", i, "\"");
+      m = cmStrCat(m, "\n  \"", i, "\"");
     }
     this->Makefile->IssueMessage(MessageType::AUTHOR_WARNING, m);
   }