docs(contributing): fix typo (#810)

Co-authored-by: Lukas Holzer <lukas.holzer@netlify.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: 3 people

CONTRIBUTING.md

@@ -69,13 +69,13 @@ If required, someone with write accesss to the repo can trigger the push for you
 
 1. Create two PRs, one branching off `focal` and one branching off `xenial`, with your changes applied to each.
 2. Once the PRs are approved, merge them into their respective base branches. The merge commit should also follow the [conventional commit format](https://www.conventionalcommits.org/en/v1.0.0-beta.2/#summary).
-3. Commits which are prefaced withb `fix:` or `feat:` will trigger package release PRs created by [release-please](https://github.com/googleapis/release-please). Merge these PRs. If you need to manually trigger a release-please PR you can bump the version by creating an [empty PR](https://github.com/netlify/build-image/pull/728).
+3. Commits which are prefaced with `fix:` or `feat:` will trigger package release PRs created by [release-please](https://github.com/googleapis/release-please). Merge these PRs. If you need to manually trigger a release-please PR you can bump the version by creating an [empty PR](https://github.com/netlify/build-image/pull/728).
 4. Wait for the CI pipelines to finish. Renovate should automatically create a PR in `buildbot` with the latest `build-image` releases (this may not happen straight away, but you can speed it up by checking [the box in this PR](https://github.com/netlify/buildbot/issues/912) or manually create a PR to bump [the version](https://github.com/netlify/buildbot/blob/0ada244ab84a1759a70d6b2cfc27c9987b5c77ca/.circleci/config.yml#L141-L150)).
 5. Review, test and deploy the PR in `buildbot`.
 
 ### Running Test `buildbot` Releases
 
-If you want to test a particular `build-image` change before going through the regular release process, you can do so by creating a PR following the process above :point-up: and pointing to any `build-image` you want. Any branch
+If you want to test a particular `build-image` change before going through the regular release process, you can do so by creating a PR following the process above :point_up: and pointing to any `build-image` you want. Any branch
 creates a valid `build-image` tag in the docker registry. Once the PR in `buildbot` is created, you can test your `build-image` change by referring to `buildbot`'s [test instructions](https://github.com/netlify/buildbot#testing-builds-on-a-live-test-site).
 
 ## License