fix(includes): rewrite need_improvement.txt as MyST so plain `{include}` renders correctly (backport #2016)

Manual backport of #2016 to sagitta — Mergify auto-backport failed
because sagitta's version of the file is a partial MyST conversion with
leftover RST garbage (`    \fi` line, RST `:ref:` syntax in MyST file).

Same fix as rolling: wrap the MyST admonition in `::::{only} not latex`
to preserve the LaTeX/PDF suppression from the original
`.. raw:: latex \iffalse / \fi` guard. `.readthedocs.yml` declares
`formats: - pdf`, so PDF output is a live downstream artifact.

Sagitta does not have the `{eval-rst}` wrapper around the include
that rolling had, so the highavailability/index.md change from #2016
is not needed here.

🤖 Generated by [robots](https://vyos.io)

1 files changed, 6 insertions, 5 deletions

diff --git a/docs/_include/need_improvement.txt b/docs/_include/need_improvement.txt
index 3404c7e1..23f33f66 100644
--- a/docs/_include/need_improvement.txt
+++ b/docs/_include/need_improvement.txt
@@ -1,8 +1,9 @@
-:::{error} Call for Contributions
+::::{only} not latex
+:::{admonition} Call for Contributions
+:class: error
 
-This section needs improvements, examples and explanations.
+Help improve this section with additional content, examples, and explanations.
 
-Please take a look at the Contributing Guide for our :ref:`documentation`.
+For contribution guidelines, see {ref}`documentation`.
 :::
-
-    \fi
\ No newline at end of file
+::::