Add browser cache explanation in samples.mdx

website/src/pages/learn/samples.mdx

@@ -163,6 +163,21 @@ The last section could be written as:
 }
 ```
 
+Please note that browsers will often cache `strudel.json` on first load, and keep using the cached
+version even if the orginal has been updated. If this bites you (for example while developing a new
+sample pack), you can force the browser to download a new copy by i.e. changing capitalization of one
+character in the URL, or adding a URL attribute, such as:
+
+```javascript
+samples('https://raw.githubusercontent.com/tidalcycles/Dirt-Samples/master/strudel.json?version=2');
+```
+
+that gets ignored by GitHub (but changes the URL, forcing the browser to reload every time we increase
+the version number).
+
+It is also possible, of course, to just remove it from cache (deleting cache in browser Privacy settings,
+or from the dev console if you're technically minded, or by using a cache deleting extension).
+
 ## Github Shortcut
 
 Because loading samples from github is common, there is a shortcut: