Update CMakeLists.txt

linux/CMakeLists.txt

@@ -78,7 +78,7 @@ target_link_libraries(${BINARY_NAME} PRIVATE PkgConfig::GTK)
 add_dependencies(${BINARY_NAME} flutter_assemble)
 
 # Only the install-generated bundle's copy of the executable will launch
-# correctly, since the resources must in the right relative locations. To avoid
+# correctly, since the resources must be in the right relative locations. To avoid
 # people trying to run the unbundled copy, put it in a subdirectory instead of
 # the default top-level location.
 set_target_properties(${BINARY_NAME}