docs: add commitlint-config-jira to shared configurations list (conventional-changelog#793)

Author: Gherciu Gheorghe

README.md

@@ -128,6 +128,7 @@ A number of shared configurations are available to install and use with `commitl
 * [@commitlint/config-patternplate](./@commitlint/config-patternplate)
 * [conventional-changelog-lint-config-atom](https://github.com/erikmueller/conventional-changelog-lint-config-atom)
 * [conventional-changelog-lint-config-canonical](https://github.com/gajus/conventional-changelog-lint-config-canonical)
+* [commitlint-config-jira](https://github.com/Gherciu/commitlint-jira)
 
 >⚠️ If you want to publish your own shareable config then make sure it has a name aligning with the pattern `commitlint-config-emoji-log` or `commitlint-config-your-config-name` — then in extend all you have to write is `emoji-log` or `your-config-name`.