Attempt to use rechunk again, switching ubuntu version to 22.04

.github/workflows/build.yml

@@ -18,7 +18,7 @@ on:
 jobs:
   bluebuild:
     name: Build Custom Image
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     permissions:
       contents: read
       packages: write
@@ -43,3 +43,4 @@ jobs:
 
           # enabled by default, disable if your image is small and you want faster builds
           maximize_build_space: true
+          rechunk: true