loosen package version range

docs/requirements.txt

@@ -42,7 +42,7 @@ sphinx>=5.0.2
     # via
     #   -r docs/requirements.in
     #   sphinx-rtd-theme
-sphinx-rtd-theme==1.0.0
+sphinx-rtd-theme>=1.0.0
     # via -r docs/requirements.in
 sphinxcontrib-applehelp==1.0.2
     # via sphinx