Correct typos

Correct all typos found by cspell.

Author: ClaCodes

.github/actions/jq_valid/action.yml

@@ -1,7 +1,7 @@
 ---
 name: 'jq_valid'
 description:
-  'Checks valididty of .json files with jq'
+  'Checks validity of .json files with jq'
 runs:
   using: 'composite'
   steps:

.github/actions/shellcheck/action.yml

@@ -1,7 +1,7 @@
 ---
 name: 'shellcheck'
 description:
-  'Chechs all shellscripts in repo'
+  'Checks all shell scripts in repo'
 runs:
   using: 'composite'
   steps:

README.md

@@ -1,5 +1,5 @@
 # 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 probebly 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 probably could also just copy them.
 
 # Goals
 - single header in style of [stb](https://github.com/nothings/stb)

scripts/jq_format.sh

@@ -11,7 +11,7 @@ for FILE in $FILES; do
             elif [ "$1" == "--apply" ]; then
                 cp "$FILE.temp" "$FILE"
             else
-                printf "%s;; \`jq\` would format this file. Use \`./scripts/jq_format.sh --diff\` to see the changes it would make and \`./scripts/jq_format.sh --apply\` to aply them.\n" "$FILE"
+                printf "%s;; \`jq\` would format this file. Use \`./scripts/jq_format.sh --diff\` to see the changes it would make and \`./scripts/jq_format.sh --apply\` to apply them.\n" "$FILE"
             fi
         fi
         rm "$FILE.diff"