add backstab5983 as a contributor for doc (#2642)

Signed-off-by: Daniel Gray <dngray@privacyguides.org>

.all-contributorsrc

@@ -2754,6 +2754,15 @@
       "contributions": [
         "translation"
       ]
+    },
+    {
+      "login": "backstab5983",
+      "name": "backstab5983",
+      "avatar_url": "https://avatars.githubusercontent.com/u/21013752?v=4",
+      "profile": "https://github.com/backstab5983",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 5,