doc: add protoncheck
@@ -2845,6 +2845,7 @@ _**Unofficial** set of patterns for structuring projects._
* [nes](https://github.com/fogleman/nes) - Nintendo Entertainment System (NES) emulator written in Go.
* [Orbit](https://github.com/gulien/orbit) - A simple tool for running commands and generating files from templates.
* [peg](https://github.com/pointlander/peg) - Peg, Parsing Expression Grammar, is an implementation of a Packrat parser generator.
+* [protoncheck](https://github.com/servusdei2018/protoncheck) - ProtonMail module for waybar/polybar/yabar/i3blocks.
* [restic](https://github.com/restic/restic) - De-duplicating backup program.
* [scc](https://github.com/boyter/scc) - Sloc Cloc and Code, a very fast accurate code counter with complexity calculations and COCOMO estimates.
* [Seaweed File System](https://github.com/chrislusf/seaweedfs) - Fast, Simple and Scalable Distributed File System with O(1) disk seek.
