Clean up Nightly release version & notes (#6877)

* pierremtb/adhoc/clean-up-nightly-on-merge

* To revert: test to upload builds at test/nightly

* Remove + suffix trim that's not needed anymore

* Revert "To revert: test to upload builds at test/nightly"

This reverts commit b0549d426f.

src/main.ts

@@ -446,6 +446,9 @@ export function getAutoUpdater(): AppUpdater {
   // Using destructuring to access autoUpdater due to the CommonJS module of 'electron-updater'.
   // It is a workaround for ESM compatibility issues, see https://github.com/electron-userland/electron-builder/issues/7976.
   const { autoUpdater } = electronUpdater
+  // Allows us to rollback to a previous version if needed.
+  // See https://github.com/electron-userland/electron-builder/blob/7dbc6c77c340c869d1e7effa22135fc740003a0f/packages/electron-updater/src/AppUpdater.ts#L450-L451
+  autoUpdater.allowDowngrade = true
   return autoUpdater
 }