Update CONTRIBUTING.md about committing ModCache.lua

CONTRIBUTING.md

@@ -48,7 +48,7 @@ Feature requests are always welcome. Note that not all requests will receive an
 ### When submitting a pull request:
 * **Pull requests must be created against the `dev` branch**, as all changes to the code are staged there before merging to `master`.
 * Make sure that the changes have been thoroughly tested!
-* Make sure not to commit `./src/Data/ModCache.lua`. This is a very large, automatically generated file that is updated in the repository for releases only.
+* If you're updating mod parsing logic, make sure to reload PoB with `Ctrl` + `F5` to regenerate `./src/Data/ModCache.lua`. This is a very large, automatically generated file that can be used to verify your changes didn't affect any other mods inadvertently.
 * There are many more files in the `./src/Data` directory that are automatically generated. This is indicated by the header 
   `-- This file is automatically generated, do not edit!`. To change these, instead change the scripts in the `./src/Export` directory and rerun the exporter.
   For your PR, please include all relevant changes to both the scripts and data files.