chore(deps): update dependency myst-parser to v4

Part-of: <!12>

pyproject.toml

@@ -24,7 +24,7 @@ requests = "^2"
 [tool.poetry.dev-dependencies]
 Sphinx = "^4.5.0 || ^8.0.0"
 coverage = "^6.3.2 || ^7.0.0"
-myst-parser = "^0.17.0 || ^0.19.0 || ^1.0.0"
+myst-parser = "^0.17.0 || ^0.19.0 || ^1.0.0 || ^4.0.0"
 sphinx-rtd-theme = "^1.0.0"
 
 [build-system]