Add recommendation for version number bumps

Author: koesie10

CONTRIBUTING.md

@@ -228,6 +228,13 @@ Pre-recorded scenarios are stored in `./src/mocks/scenarios`. However, it's poss
 1. Double-check the `CHANGELOG.md` contains all desired change comments and has the version to be released with date at the top.
     * Go through all recent PRs and make sure they are properly accounted for.
     * Make sure all changelog entries have links back to their PR(s) if appropriate.
+    * For picking the new version number, we default to increasing the patch version number, but make our own judgement about whether a change is big enough to warrant a minor version bump. Common reasons for a minor bump could include:
+      * Making substantial new features available to all users. This can include lifting a feature flag.
+      * Breakage in compatibility with recent versions of the CLI.
+      * Minimum required version of VS Code is increased.
+      * New telemetry events are added.
+      * Deprecation or removal of commands.
+      * Accumulation of many changes, none of which are individually big enough to warrant a minor bump, but which together are. This does not include changes which are purely internal to the extension, such as refactoring, or which are only available behind a feature flag.
 1. Double-check that the node version we're using matches the one used for VS Code. If it doesn't, you will then need to update the node version in the following files:
     * `.nvmrc` - this will enable `nvm` to automatically switch to the correct node version when you're in the project folder
     * `.github/workflows/main.yml` - all the "node-version: <version>" settings