add GnuPG icon: fa-gnupg

closes #72

src/icons/icons.yml

@@ -1856,7 +1856,7 @@ icons:
       - eastern
     categories:
       - Web Application Icons
-      
+
   - name:       Globe
     id:         globe-w
     unicode:    f305
@@ -6962,3 +6962,11 @@ icons:
     url:        nextcloud.com
     categories:
       - Brand Icons
+
+  - name:       GnuPG
+    id:         gnupg
+    unicode:    f308
+    created:    1.0
+    url:        gnupg.org
+    categories:
+      - Brand Icons