update requirements.txt to eliminate error in #64

docs/requirements.txt

@@ -1,34 +1,36 @@
-Babel==2.8.0
-click==7.1.2
-future==0.18.2
-gitdb==4.0.5
-GitPython==3.1.7
-htmlmin==0.1.12
-importlib-metadata==1.7.0
-Jinja2==2.11.2
-joblib==0.16.0
-jsmin==3.0.0
-livereload==2.6.1
-lunr==0.5.8
-Markdown==3.2.2
-MarkupSafe==1.1.1
-mkdocs==1.1.2
-mkdocs-awesome-pages-plugin==2.2.1
-mkdocs-git-revision-date-localized-plugin==0.7
-mkdocs-material
-mkdocs-material-extensions
-mkdocs-minify-plugin==0.3.0
-mkdocs-redirects==1.0.1
-nltk==3.5
-Pygments==2.6.1
-pymdown-extensions==7.1
-pytz==2020.1
-PyYAML==5.3.1
-regex==2020.7.14
-six==1.15.0
-smmap==3.0.4
-tornado==6.0.4
-tqdm==4.48.2
-zipp==3.1.0
-mkdocs-git-revision-date-plugin
-mike
+Babel==2.14.0
+certifi==2023.11.17
+charset-normalizer==3.3.2
+click==8.1.7
+colorama==0.4.6
+csscompressor==0.9.5
+ghp-import==2.1.0
+gitdb==4.0.11
+GitPython==3.1.41
+htmlmin2==0.1.13
+idna==3.6
+Jinja2==3.1.3
+jsmin==3.0.1
+Markdown==3.5.2
+MarkupSafe==2.1.4
+mergedeep==1.3.4
+mkdocs==1.5.3
+mkdocs-git-revision-date-plugin==0.3.2
+mkdocs-material==9.5.6
+mkdocs-material-extensions==1.3.1
+mkdocs-minify-plugin==0.8.0
+packaging==23.2
+paginate==0.5.6
+pathspec==0.12.1
+platformdirs==4.1.0
+Pygments==2.17.2
+pymdown-extensions==10.7
+python-dateutil==2.8.2
+PyYAML==6.0.1
+pyyaml_env_tag==0.1
+regex==2023.12.25
+requests==2.31.0
+six==1.16.0
+smmap==5.0.1
+urllib3==2.2.0
+watchdog==3.0.0