fix(ci): use the correct commit message when bumping packages MONGOSH…

…-1871 (mongodb-js#2333)

bump-packages from monorepo-tools is looking for chore(ci): bump packages as the start of the commit to calculate the semver bump. The problem is that our commit message doesn't start with this - instead it's chore(release): bump auxiliary packages. This means that the next time we run it, we go back to the start of time and sure enough, we find some breaking commit message and decide we need to bump major. Luckily there's a LAST_BUMP_COMMIT_MESSAGE we can use to set this, so this does that.

packages/build/src/npm-packages/bump.ts

@@ -95,6 +95,7 @@ export function bumpAuxiliaryPackages() {
     encoding: 'utf8',
     env: {
       ...process.env,
+      LAST_BUMP_COMMIT_MESSAGE: 'chore(release): bump auxiliary packages',
       SKIP_BUMP_PACKAGES: [
         ...EXCLUDE_RELEASE_PACKAGES,
         ...MONGOSH_RELEASE_PACKAGES,