Add Hollo to examples

[ci skip]

Author: dahlia

.vscode/settings.json

@@ -65,6 +65,7 @@
     "lume",
     "lumocs",
     "metas",
+    "microblogging",
     "Misskey",
     "multibase",
     "multikey",

examples/README.md

@@ -8,6 +8,8 @@ added in the future.[^1]
   -  [Actor lookup CLI](./actor-lookup-cli/)
   -  [Federated single-user blog](./blog/)
   -  [Fedi badge](https://github.com/dahlia/fedi-badge)
+  -  [Hollo: a federated single-user microblogging
+     software](https://github.com/dahlia/hollo)
   -  [Hono integration sample](./hono-sample/)
 
 [^1]: Contributions are welcome!  If you have built an application with the