[image-builder-bob] update buildkit alpine to 3.22 (#20942)

Author: iQQBot

components/image-builder-bob/leeway.Dockerfile

@@ -2,7 +2,7 @@
 # Licensed under the GNU Affero General Public License (AGPL).
 # See License.AGPL.txt in the project root for license information.
 
-FROM ghcr.io/gitpod-io/buildkit:v0.20.1-gitpod.2
+FROM ghcr.io/gitpod-io/buildkit:v0.20.1-gitpod.3
 
 USER root
 RUN apk --no-cache add sudo bash \