Fix links to point to https://quarkus.io/guides/config-yaml

[rolfedh]

Describe the bug

Some links point to https://quarkus.io/guides/config#yaml; however, #yaml is not a valid bookmark.
I believe that is an outdated link target, and the correct link target is now: https://quarkus.io/guides/config-yaml

Expected behavior

The link should open a YAML-related section in the config guide.

Actual behavior

The link doesn't find a YAML-related section in the config guide and defaults to the top of the page.

How to Reproduce?

Open the "Documentation" link on https://quarkus.io/extensions/io.quarkus/quarkus-config-yaml

Output of uname -a or ver

No response

Output of java -version

No response

GraalVM version (if different from Java)

No response

Quarkus version or git rev

No response

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

No response

[rolfedh]

/assign rolfedh

[quarkus-bot]

/cc @MichalMaler (documentation), @ebullient (documentation), @hmanwani-rh (documentation), @inoxx03 (documentation), @michelle-purcell (documentation), @sheilamjones (documentation), @sunayna15 (documentation)