Merge pull request #54 from ouseful-PR/patch-1

Update syntax.md: use with Jupyter Book

Author: mmcky

docs/source/syntax.md

@@ -10,6 +10,17 @@ When using other themes (such as `alabaster`) the icons for the `exercise` and `
 We would like to make this more theme agnostic and status can be found in [this issue](https://github.com/executablebooks/sphinx-exercise/issues/51)
 ```
 
+`````{note}
+To use this extension in a Jupyter Book project, add `sphinx_exercise` as an extension in the `_config.yml` file.
+
+```{code-block} python
+sphinx:
+    extra_extensions:
+        - sphinx_exercise
+```
+
+`````
+
 ```{note}
 This documentation utilized the [Markedly Structured Text (MyST)](https://myst-parser.readthedocs.io/en/latest/index.html) syntax.
 ```