chore(gitlab): increase arm64 size check (#721)

Self-descriptive

Author: duncanista

.gitlab/datasources/flavors.yaml

@@ -16,7 +16,7 @@ flavors:
     needs_layer_publish: true
     suffix: arm64
     layer_name_base_suffix: "-ARM"
-    max_layer_compressed_size_mb: 21
+    max_layer_compressed_size_mb: 22
     max_layer_uncompressed_size_mb: 50
 
   - name: amd64, alpine