shared-config: alphabetize ecosystems

Signed-off-by: Patrick Linnane <patrick@linnane.io>

Author: p-linnane

.github/actions/sync/shared-config.rb

@@ -75,12 +75,12 @@ def git(*args)
   when "bundler"
     bundler_ecosystem = true
     "Gemfile.lock"
-  when "npm"
-    "package.json"
-  when "docker"
-    "Dockerfile"
   when "devcontainers"
     ".devcontainer/devcontainer.json"
+  when "docker"
+    "Dockerfile"
+  when "npm"
+    "package.json"
   when "pip"
     "requirements.txt"
   end