[spring-boot.txt] Add new endpoints

[righettod]

Hi,

This PR use this documentation to add the prefix management/ to endpoints list from this documentation:

Command used to extract endpoints:

curl -sk https://docs.spring.io/spring-boot/docs/2.1.7.RELEASE/reference/html/production-ready-endpoints.html | grep -Po '<code class="literal">([a-z]+)</code>' | cut -d'>' -f2 | cut -d'<' -f1 | sort -u

Thanks in advance 😃

[ItsIgnacioPortal]

Good stuff @righettod 👍

[righettod]

Thank you very much @ItsIgnacioPortal 👍

[g0tmi1k]

Thanks @righettod . Great suggestion - as all the others <3

and I love how detailed the pull request is!

[righettod]

Thank you very much ❤️