[contour] TerminalSessionManager: Fix include ordering

Signed-off-by: Christian Parpart <[email protected]>

src/contour/TerminalSessionManager.cpp

@@ -14,8 +14,8 @@
 
 #include <algorithm>
 #include <filesystem>
-#include <string>
 #include <mutex>
+#include <string>
 
 using namespace std::string_literals;