chore: docs on how to bump versions

Author: dummdidumm

README.md

@@ -25,3 +25,7 @@ The next steps depend on whether you want to run this locally in filesystem mode
 ## Creating new tutorials
 
 Tutorials live inside `content`. Each tutorial consists of a `README.md`, which is the text to the left, and `app-a` and `app-b` folders, which represent the initial and solved state. Files that stay the same can be omitted from `app-b`. Files are marked as deleted in `app-b` if they start with `__delete`. Folders that are marked as deleted in `app-b` if they contain a file named `__delete`.
+
+## Bumping tutorial dependencies
+
+Bump the dependency (for example Svelte) in both the root and the `content/common` `package.json`. In the root do `pnpm i` (to update `pnpm-lock.yaml`), in `content/common` do `npm i` (to update `package-lock.json`). After deployment things might be out of date because Vercel caches things, redeploy without cache in that case.