Updated Release Process (markdown)

Release-Process.md

@@ -46,6 +46,12 @@ The changelog should be updated with new features, bug fixes, and contributor li
 /changelog.txt
 ```
 
+## Tests
+
+The test recordings include the version number in the User-Agent header of each request. You may be able to find/replace those, or you may have to create new recordings.
+
+In any case, make sure that the tests succeed in playback mode after you've incremented the version.
+
 ## Docs
 
 ### ReadTheDocs