doc: fix list of examples to include the nanoparticle example

.github/ISSUE_TEMPLATE/release_checklist.md

@@ -9,7 +9,7 @@ assignees: ""
 ### checklist for diffpy.cmi
 
 - [ ] Manually trigger the `validate-examples.yml` workflow to run all example scripts.
-- [ ] Make sure available examples, packs, and profiles are listed in the docs. Check this by installing locally with `pip install .`, building the docs with `cmi install docs && cd docs && make html && open build/html/index.html`, running `cmi info`, and comparing the output to what is listed under "Examples" in the docs.
+- [ ] Make sure available examples, packs, and profiles are listed in the docs. Check this by installing locally with `pip install .`, building the docs with `cmi install docs && cd docs && make html && open build/html/index.html`, running `cmi info`, and comparing the output to what is listed in the docs.
 
 ### PyPI/GitHub rc-release preparation checklist:
 

docs/source/tutorials/pdf.rst

@@ -12,6 +12,7 @@ Available Examples
 - ch07StructuralPhaseTransitions
 - ch08NPRefinement
 - ch11ClusterXYZ
+- nanoparticle-fit
 
 Ni PDF Fitting Tutorial
 -----------------------

news/add-ex.rst

@@ -0,0 +1,23 @@
+**Added:**
+
+* No news needed, add example to list in docs.
+
+**Changed:**
+
+* <news item>
+
+**Deprecated:**
+
+* <news item>
+
+**Removed:**
+
+* <news item>
+
+**Fixed:**
+
+* <news item>
+
+**Security:**
+
+* <news item>