Wrap k8s deprecation changes in a details tag

README.md

@@ -20,6 +20,9 @@ At the time of writing, only one small change has been made to this helm
 chart to reflect deprecations in newer versions of Kubernetes. These changes
 can be seen in this commit: 8477b491d94b120ecda0953ed230e7589e3cfb56. For convenience, the changes are shown below.
 
+<details>
+<summary>Kubernetes Deprecation Changes</summary>
+
 ```diff
 --- a/chart/helm-nginx-example/templates/ingress.yaml	(revision 6498dbf8231b37d521831df91af1418631b91722)
 +++ b/chart/helm-nginx-example/templates/ingress.yaml	(date 1620663685002)
@@ -54,6 +57,8 @@ can be seen in this commit: 8477b491d94b120ecda0953ed230e7589e3cfb56. For conven
 
 ```
 
+</details>
+
 Check the git history of the `chart` directory for any other changes that
 may have been made.