Rename skill.md to SKILL.md

Author: Microck

docs/skill.md docs/SKILL.mddocs/skill.md renamed to docs/SKILL.md

@@ -373,4 +373,4 @@ kagi batch "topic1" "topic2" "topic3" --format csv > comparison.csv
 - GitHub: https://github.com/Microck/kagi-cli
 - npm: https://www.npmjs.com/package/kagi-cli
 - Kagi: https://kagi.com
-- Auth Matrix: https://kagi.micr.dev/reference/auth-matrix
+- Auth Matrix: https://kagi.micr.dev/reference/auth-matrix