Fix broken links

[kapunahelewong]

Some of the links need to be updated to reflect the new structure and a few file name changes. Currently the broken links are listed when serving locally as the following:

WARNING  -  Documentation file 'index.md' contains a link to 'docs/range_request.md' which is not
            found in the documentation files.
WARNING  -  Documentation file 'index.md' contains a link to 'docs/tracing.md' which is not found in
            the documentation files.
WARNING  -  Documentation file 'caches.md' contains a link to '../cmd/trickster/conf/example.conf'
            which is not found in the documentation files.
WARNING  -  Documentation file 'collapsed-forwarding.md' contains a link to
            '../cmd/trickster/conf/example.conf' which is not found in the documentation files.
WARNING  -  Documentation file 'configuring.md' contains a link to
            '../cmd/trickster/conf/example.conf' which is not found in the documentation files.
WARNING  -  Documentation file 'configuring.md' contains a link to
            '../cmd/trickster/conf/example.conf' which is not found in the documentation files.
WARNING  -  Documentation file 'deployment.md' contains a link to 'helm.sh' which is not found in
            the documentation files.
WARNING  -  Documentation file 'health.md' contains a link to '../cmd/trickster/conf/example.conf'
            which is not found in the documentation files.
WARNING  -  Documentation file 'health.md' contains a link to '../cmd/trickster/conf/example.conf'
            which is not found in the documentation files.
WARNING  -  Documentation file 'multi-origin.md' contains a link to
            '../cmd/trickster/conf/example.conf' which is not found in the documentation files.
WARNING  -  Documentation file 'negative-caching.md' contains a link to
            '../cmd/trickster/conf/example.conf' which is not found in the documentation files.
WARNING  -  Documentation file 'new-changed-1.1.md' contains a link to
            '../cmd/trickster/conf/example.conf' which is not found in the documentation files.
WARNING  -  Documentation file 'open-telemetry.md' contains a link to '../go.mod' which is not found
            in the documentation files.
WARNING  -  Documentation file 'paths.md' contains a link to 'request_rewriters.md' which is not
            found in the documentation files.
WARNING  -  Documentation file 'retention.md' contains a link to
            '../cmd/trickster/conf/example.conf' which is not found in the documentation files.
WARNING  -  Documentation file 'rule.md' contains a link to 'rewriters.md' which is not found in the
            documentation files.

[kapunahelewong]

Logged for transparency. I'm working on this. 🙂

[kapunahelewong]

For the links that originally went here: ../cmd/trickster/conf/example.conf, it appears that the original file might have moved/changed because there's no more conf directory in https://github.com/trickstercache/trickster/tree/main/cmd/trickster. Might there be a file I should link to in config, @jranson?

[kapunahelewong]

Fixed links except for the ones to example.conf, which are in the following files:

collapsed-forwarding.md
configuring.md
health.md
multi-origin.md
negative-caching.md
new-changed-1.1.md
retention.md