Update docs' dependencies

Author: mdmintz

mkdocs_build/requirements.txt

@@ -6,7 +6,7 @@ livereload==2.6.3;python_version>="3.6"
 joblib==1.1.0;python_version>="3.6"
 Markdown==3.3.4;python_version>="3.6"
 MarkupSafe==2.0.1;python_version>="3.6"
-pyparsing==3.0.3;python_version>="3.6"
+pyparsing==2.4.7;python_version>="3.6"
 keyring==23.2.1;python_version>="3.6"
 pkginfo==1.7.1;python_version>="3.6"
 Jinja2==3.0.2;python_version>="3.6"
@@ -21,7 +21,7 @@ lunr==0.6.1;python_version>="3.6"
 nltk==3.6.5;python_version>="3.6"
 watchdog==2.1.6;python_version>="3.6"
 mkdocs==1.2.3;python_version>="3.6"
-mkdocs-material==7.3.5;python_version>="3.6"
+mkdocs-material==7.3.6;python_version>="3.6"
 mkdocs-exclude-search==0.5.2;python_version>="3.6"
 mkdocs-simple-hooks==0.1.3
 mkdocs-material-extensions==1.0.3;python_version>="3.6"