Link fix of Spring Boot Starter other-spring-autoconfig.md

[chalin]

The folder/package opentelemetry-spring-boot-autoconfigure doesn't seem to exist anymore. Also, the following link has an invalid hash, but in any case it points back to this website, so we should just refer directly to this website. WDYT @trask @open-telemetry/java-instrumentation-approvers?

[opentelemetry-spring-boot-autoconfigure](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/instrumentation/spring/spring-boot-autoconfigure/README.md#features?FIXME)

This work is in support of:

• [chore] Ensure that external link fragments are valid #6196

Related:

• add zipkin spring documentation #6205

[zeitlinger]

I think the content for zipkin doesn't exist anywhere.

It used to be here: https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/71b3e3e027f78a2a44007129a4bad32a641d8103/instrumentation/spring/spring-boot-autoconfigure/README.md#features

This should probably be included here directly.
Until then, I'd suggest to create a ticket and remove the link.

[chalin]

@zeitlinger - If you have the necessary permissions, would you be willing to edit the file directly in this PR? Otherwise, please add the link(s) to the issues and/or PRs you create as a followup to this PR -- and then I'll close it.

[zeitlinger]

should I create a documentation issue in this repo?

[chalin]

Well, this repo's page content/en/docs/zero-code/java/spring-boot-starter/other-spring-autoconfig.md, referenced in this PR, needs to be updated. So, if you let me know what updates you'd like I can make them. Or, like for the other PR, you can just submit suggestions on this PR. Or you can create an issue in this repo, yes :).

[zeitlinger]

Well, this repo's page content/en/docs/zero-code/java/spring-boot-starter/other-spring-autoconfig.md, referenced in this PR, needs to be updated. So, if you let me know what updates you'd like I can make them. Or, like for the other PR, you can just submit suggestions on this PR. Or you can create an issue in this repo, yes :).

created #6205

[zeitlinger]

Or, like for the other PR, you can just submit suggestions on this PR.

done

[chalin]

Thanks @zeitlinger, your update LGTM. Will still need others to approve.