docs: updates based on reviews

Author: echarles

docs/README.md

@@ -1,3 +1,3 @@
 # Jupyter Server Docs Sources
 
-Read [this pageg](https://jupyter-server.readthedocs.io/en/latest/contributors/contributing.html#building-the-docshttps://jupyter-server.readthedocs.io/en/latest/contributors/contributing.html#building-the-docs) to build the docs.
+Read [this page](https://jupyter-server.readthedocs.io/en/latest/contributors/contributing.html#building-the-docs) to build the docs.

docs/source/developers/extensions.rst

@@ -4,7 +4,7 @@ Server Extensions
 
 A Jupyter Server extension is typically a module or package that extends to Server’s REST API/endpoints—i.e. adds extra request handlers to Server’s Tornado Web Application.
 
-You can check some simple example on the `examples folder
+You can check some simple examples on the `examples folder
 <https://github.com/jupyter/jupyter_server/tree/master/examples/simple>`_ in the GitHub jupyter_server repository.
 
 Authoring a basic server extension

docs/source/operators/security.rst

@@ -217,5 +217,4 @@ To share a signatures database among users, you can configure:
     c.NotebookNotary.data_dir = "/path/to/signature_dir"
 
 to specify a non-default path to the SQLite database (of notebook hashes,
-essentially). We are aware that SQLite doesn't work well on NFS and we are
-`working out better ways to do this <https://github.com/jupyter/notebook/issues/1782>`_.
+essentially).

docs/source/other/changelog.rst

@@ -30,7 +30,7 @@ We strongly recommend that you upgrade to version 9+ of pip before upgrading ``j
 - Classic server extension discovery and support
 - Bug fixes
 - Ready for users
-- JupyterLab is the first servver running on top of Jupyter Server
+- JupyterLab is the first server running on top of Jupyter Server
 
 .. _release-0.0.2: