docs: Remove warning which considers v2 as not production ready

[seakayone]

Issue Number: DEV-

Pull Request Checklist

Basic Requirements

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix: represents bug fixes
• Refactor: represents production code refactoring
• Feature: represents a new feature
• Documentation: documentation changes (no production code change)
• Chore: maintenance tasks (no production code change)
• Style: styles updates (no production code change)
• Test: all about tests: adding, refactoring tests (no production code change)
• Other... Please describe:

Does this PR introduce a breaking change?

• Yes
• No

Does this PR change client-test-data?

• Yes (don't forget to update the JS-LIB team about the change)
• No

Other information

[BalduinLandolt]

tests failed for some reason, but once that's taken care of, you're good to merge

[codecov]

Codecov Report

Base: 86.85% // Head: 86.99% // Increases project coverage by +0.13% 🎉

Coverage data is based on head (68110db) compared to base (c5c98ce).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2282      +/-   ##
==========================================
+ Coverage   86.85%   86.99%   +0.13%     
==========================================
  Files         241      242       +1     
  Lines       27967    28067     +100     
==========================================
+ Hits        24292    24416     +124     
+ Misses       3675     3651      -24     

Impacted Files	Coverage Δ
webapi/src/main/scala/org/knora/webapi/Main.scala	0.00% <ø> (ø)
...c/main/scala/org/knora/webapi/core/AppServer.scala	89.55% <ø> (ø)
...p-shared/src/main/scala/dsp/valueobjects/Iri.scala	94.18% <100.00%> (-0.14%)	⬇️
...sp-shared/src/main/scala/dsp/valueobjects/V2.scala	89.85% <100.00%> (+5.79%)	⬆️
...sp-shared/src/main/scala/dsp/valueobjects/Id.scala	65.38% <0.00%> (-3.85%)	⬇️
...n/scala/org/knora/webapi/routing/HealthRoute.scala	69.81% <0.00%> (-1.89%)	⬇️
...r/permissionsmessages/PermissionsMessagesADM.scala	86.39% <0.00%> (-0.32%)	⬇️
...ages/util/search/gravsearch/GravsearchParser.scala	68.13% <0.00%> (-0.26%)	⬇️
...scala/org/knora/webapi/routing/Authenticator.scala	88.88% <0.00%> (-0.08%)	⬇️
... and 14 more

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[mpro7]

2 things:

• what is docu in PR title? use one of listed prefixes here,
• have you already went thorough all you wanted to in the docs? Maybe if you are are going through anyway, you will find more things to improve, so I would say keep this branch as opened draft?

[BalduinLandolt]

ah yes, @mpro7 is right, prefix should be docs. Also, I re-ran the failing test, sometimes that's enough.