SpringBoot Link directly to the Integration Properties section of the appendix when cross-referencing Kafka properties

Hi,

this PR fixes a link in the docs, which leads to a 404 at the moment. I also took the freedom to polish this a bit more and align this with other sections where we link to the application.properties Appendix.

Before

After

SpringBoot Link directly to the Integration Properties section of the appendix when cross-referencing Kafka properties

Cheers, Christoph

Comment From: wilkinsona

Thanks for spotting this, @dreis2211. While the link's only broken in 3.0 snapshots, I think it'd be nice to link to a more specific part of the appending in all our maintained branches. We can then fix the broken link as part of merging that change forwards.

Comment From: wilkinsona

Thanks again, @dreis2211.