Add app: OpenX32 (#197)

Co-authored-by: webprofusion-chrisc <2445502+webprofusion-chrisc@users.noreply.github.com>
Co-authored-by: Christopher Cook <development@webprofusion.com>

Author: github-actions[bot]

data/apps.json

@@ -286,6 +286,16 @@
       "repo": "OpenUtau"
     }
   },
+  {
+    "name": "OpenX32",
+    "description": "Linux and Custom Firmware for the Behringer X32 Audio-Mixing-Console.",
+    "repository": {
+      "type": "GitHub",
+      "user": "OpenMixerProject",
+      "repo": "OpenX32"
+    },
+    "url": "https://discourse.openmixerproject.de/"
+  },
   {
     "name": "orDrumbox",
     "url": "https://www.ordrumbox.com/",