Update dependency myst_parser to v5.1.0 (#969)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docs/requirements.txt

@@ -1,4 +1,4 @@
 furo==2025.12.19
 sphinx==9.1.0
 sphinx-click==6.2.0
-myst_parser==5.0.0
+myst_parser==5.1.0