pin versions in requirements.txt (#400)

prep for enabling dependabot

requirements.txt

@@ -1,15 +1,15 @@
-mkdocs
-mkdocs-bibtex
-mkdocs-include-markdown-plugin
-mkdocs-table-reader-plugin
-mkdocs-material~=9.5.4
-mkdocs-material-extensions
-mkdocstrings
-mkdocstrings-python
-mkdocs-print-site-plugin
-dataclasses-json
+mkdocs==1.5.3
+mkdocs-bibtex==2.11.0
+mkdocs-include-markdown-plugin==6.0.3
+mkdocs-table-reader-plugin==2.0.3
+mkdocs-material==9.5.4
+mkdocs-material-extensions==1.3
+mkdocstrings==0.23.0
+mkdocstrings-python==1.7.3
+mkdocs-print-site-plugin==2.3.6
+dataclasses-json==0.6.1
 thefuzz==0.20.0
-pandas~=2.1.2
-scikit-learn~=1.3.2
-jsonschema~=4.19.2
-networkx~=3.1
+pandas==2.1.2
+scikit-learn==1.3.2
+jsonschema==4.19.2
+networkx==3.1