chore: bump to Session 1.15.1

Author: Bilb

package.json

@@ -2,7 +2,7 @@
   "name": "session-desktop",
   "productName": "Session",
   "description": "Private messaging from your desktop",
-  "version": "1.15.0",
+  "version": "1.15.1",
   "license": "GPL-3.0",
   "author": {
     "name": "Session Foundation",