chore(plugins): update plugin readme index

source/plugins/code/metadata.yml

@@ -1,6 +1,7 @@
 name: "♐ Code snippet of the day"
 cost: 1 REST request per 100 events fetched
 category: github
+index: 22
 supports:
   - user
   - organization

source/plugins/skyline/metadata.yml

@@ -1,7 +1,7 @@
 name: "🌇 GitHub Skyline 3D calendar"
 cost: N/A
 category: github
-index: 22
+index: 23
 supports:
   - user
 inputs: