docs: fix link to trust model (#178)

README.md

@@ -82,7 +82,7 @@ jupyter labextension disable jupyterlab-myst:executor
 
 ### Trust 🔎
 
-Jupyter Notebooks implement a [trust-based security model](https://jupyter-notebook.readthedocs.io/en/stable/security.html). With the addition of inline expressions, Markdown cells are now considered when determining whether a given notebook is "trusted". Any Markdown cell with inline-expression metadata (with display data) is considered "untrusted". Like outputs, expression results are rendered using safe renderers if the cell is not considered trusted.
+Jupyter Notebooks implement a [trust-based security model](https://jupyter-server.readthedocs.io/en/stable/operators/security.html). With the addition of inline expressions, Markdown cells are now considered when determining whether a given notebook is "trusted". Any Markdown cell with inline-expression metadata (with display data) is considered "untrusted". Like outputs, expression results are rendered using safe renderers if the cell is not considered trusted.
 Executing the notebook will cause each cell to be considered trusted.
 
 To facilitate this extension of the trust model, the `jupyterlab_myst` server extension replaces the `NotebookNotary` from `nbformat` with `MySTNotebookNotary`. This can be disabled with