Test for cspell

Introduce a few spelling mistakes and remove a word from project-words
to test cspell.

Author: ClaCodes

.cspell/project-words.txt

@@ -1,5 +1,4 @@
 gitlint
-gitspell
 shellcheck
 shfmt
 yamlfix

.github/actions/shellcheck/action.yml

@@ -1,6 +1,6 @@
 ---
 name: shellcheck
-description: Checks all shell scripts in repo
+description: Checks all shellscripts in repo
 runs:
   using: composite
   steps:

README.md

@@ -1,6 +1,7 @@
 # elo.h
 
-A simple library to compute [elo ratings](.https://en.wikipedia.org/wiki/Elo_rating_system). This is for educational purpose and licensed under MIT/public domain so you may use it. But the formulas are very simple so you probably could also just copy them.
+A simple library to compute [elo ratings](.https://en.wikipedia.org/wiki/Elo_rating_system). This is for educational purpose and licensed under MIT/public domain so you may use it. But the formulas are very simple so you 
+probebly could also just copy them.
 
 # Goals