Formatting fixes for docs

lib/kamal/configuration/docs/builder.yml

@@ -8,6 +8,7 @@
 #
 # Options go under the builder key in the root configuration.
 builder:
+
   # Arch
   #
   # The architectures to build for — you can set an array or just a single value.

lib/kamal/configuration/docs/proxy.yml

@@ -11,6 +11,7 @@
 # run on the same proxy.
 #
 proxy:
+
   # Hosts
   #
   # The hosts that will be used to serve the app. The proxy will only route requests