Update docutils requirement from <0.20,>=0.17.1 to >=0.17.1,<0.21 (#2611

)

Updates the requirements on [docutils](https://docutils.sourceforge.io/)
to permit the latest version.


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pyproject.toml

@@ -119,7 +119,7 @@ doc = [
   "sphinxcontrib-napoleon",
   "nbsphinx",
   "ipython",
-  "docutils>=0.17.1,<0.20",
+  "docutils>=0.17.1,<0.21",
 ]
 storage = [
   "ipfshttpclient>=0.4.13",