Bump myst-parser from 0.18.1 to 1.0.0 in /docs/readthedocs (#814)

Author: dependabot[bot]

docs/readthedocs/requirements.txt

@@ -2,5 +2,5 @@ commonmark==0.9.1
 recommonmark==0.7.1
 Sphinx==5.3.0
 sphinx-rtd-theme==1.2.0
-myst-parser==0.18.1
+myst-parser==1.0.0
 markdown-it-py==2.2.0