Fix typo in readme section, should be JsonPoke

Author: kzu

src/JsonPoke/readme.md

@@ -1,6 +1,6 @@
-<!-- include ../../readme.md#JsonPeek -->
+<!-- include ../../readme.md#JsonPoke -->
 
 <!-- include https://github.com/devlooped/sponsors/raw/main/footer.md -->
 
 <!-- Excludes this readme from CI-based includes expansion -->
-<!-- exclude -->
+<!-- exclude -->