docs/builder.md: remove BuilderByTarget references

[nnzv]

The 'Target name' subsection is old. BuilderByTarget isn't used anymore; it's now byTarget in target.go. Add a hyperlink for clarity and accessibility.

What type of PR is this?

Uncomment one (or more) /kind <> lines:

/kind cleanup

/kind documentation

Any specific area of the project related to this PR?

Uncomment one (or more) /area <> lines:

/area pkg

/area docs

What this PR does / why we need it:

The commit by @FedeDP seems to have caused this 56573f4, but it appears that the documentation hasn't been updated to match the current logic of the builders.

Which issue(s) this PR fixes:

Special notes for your reviewer:

No

Does this PR introduce a user-facing change?:

No

[poiana]

Welcome @nnzv! It looks like this is your first PR to falcosecurity/driverkit 🎉

[nnzv]

/assign FedeDP

[FedeDP]

Hi!
Thanks for this PR! It LGTM!
The commit is missing the dco though, can you fix it? https://github.com/falcosecurity/.github/blob/main/CONTRIBUTING.md#developer-certificate-of-origin

[nnzv]

The commit is missing the dco though, can you fix it? https://github.com/falcosecurity/.github/blob/main/CONTRIBUTING.md#developer-certificate-of-origin

Thanks for pointing that out. Didn't notice. Fixed now.

[FedeDP]

/approve

[poiana]

LGTM label has been added.

Git tree hash: 9db885e3ab116fab373b9f17d51bc198be254f95

[poiana]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: FedeDP, nnzv

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