Merge pull request #569 from hachyderm/add-highlandapp

Added Highland App

Author: quintessence

community.hachyderm.io/content/en/approved/_index.md

@@ -77,6 +77,7 @@ other API hooks, podcasts, and so forth.**
 * <a rel="me" href="https://hachyderm.io/@fluiddyn">FluidDyn</a>
 * <a rel="me" href="https://hachyderm.io/@followthecrypto">followthecrypto</a>
 * <a rel="me" href="https://hachyderm.io/@golang">The Go Language</a>
+* <a rel="me" href="https://hachyderm.io/@highland">The Highland App</a>
 * <a rel="me" href="https://hachyderm.io/@hydrogen">Hydrogen</a>
 * <a rel="me" href="https://hachyderm.io/@macadminsopensource">Mac Admins Open Source</a>
 * <a rel="me" href="https://hachyderm.io/@netobserv">NetObserv</a>