docs(theme): auto update theme readme (#457)

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

Author: github-actions[bot]

themes/README.md

@@ -37,7 +37,8 @@ Use `?theme=THEME_NAME` parameter like so :-
 | `kanagawa` ![kanagawa][kanagawa] | `kanagawa_light` ![kanagawa_light][kanagawa_light] | `space` ![space][space] |
 | `space_light` ![space_light][space_light] | `lavender_breeze` ![lavender_breeze][lavender_breeze] | `lavender_dream` ![lavender_dream][lavender_dream] |
 | `sunset-gradient` ![sunset-gradient][sunset-gradient] | `ocean-gradient` ![ocean-gradient][ocean-gradient] | `ambient-gradient` ![ambient-gradient][ambient-gradient] |
-| `siny-gradient` ![siny-gradient][siny-gradient] | `purple-gradient` ![purple-gradient][purple-gradient] |
+| `siny-gradient` ![siny-gradient][siny-gradient] | `purple-gradient` ![purple-gradient][purple-gradient] | `monochrome-light-gradient` ![monochrome-light-gradient][monochrome-light-gradient] |
+| `monochrome-dark-gradient` ![monochrome-dark-gradient][monochrome-dark-gradient] |
 
 
 Want to add a new theme? Consider reading the [contribution guidelines](/CONTRIBUTING.md#-themes-contribution) :D
@@ -116,3 +117,5 @@ Want to add a new theme? Consider reading the [contribution guidelines](/CONTRIB
 [ambient-gradient]: https://github-readme-profile-alpha.vercel.app/api?username=FajarKim&theme=ambient-gradient
 [siny-gradient]: https://github-readme-profile-alpha.vercel.app/api?username=FajarKim&theme=siny-gradient
 [purple-gradient]: https://github-readme-profile-alpha.vercel.app/api?username=FajarKim&theme=purple-gradient
+[monochrome-light-gradient]: https://github-readme-profile-alpha.vercel.app/api?username=FajarKim&theme=monochrome-light-gradient
+[monochrome-dark-gradient]: https://github-readme-profile-alpha.vercel.app/api?username=FajarKim&theme=monochrome-dark-gradient