make_src_dist.py: Update documentation

tools/make_src_dist.py

@@ -16,8 +16,8 @@ It contains the following:
       While this file can be generated by the build system, it requires
       the `smpq` host dependency which may be missing in some distributions.
 
-   3. `CMakeFlags.txt` - a file the cmake flags containing the version,
-      the path to `devilutionx.mpq` and the dependency path.
+   3. `CMakeLists.txt` - a file with the cmake flags containing the version,
+      the path to `devilutionx.mpq` and the `FetchContent` dependency paths.
 
       This file is automatically used by the build system if present.