Format track config with configlet fmt (#2321)

* Format track config

* [CI] Format code

* Format config

* Add config.json to.prettierignore

* Refresh copy of config.json

* Update prettierignore to avoid formating problem-specs markdown

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Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

.prettierignore

@@ -10,3 +10,8 @@ LICENSE
 # These are formatted via configlet and will not match prettier
 exercises/**/.meta/config.json
 exercises/**/.approaches/config.json
+config.json
+
+# Originates from https://github.com/exercism/problem-specifications
+exercises/practice/**/.docs/instructions.md
+exercises/practice/**/.docs/introduction.md