docs: add hammster as a contributor (#1264)

docs: add hammster as a contributor

.all-contributorsrc

@@ -162,6 +162,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "hammster",
+      "name": "Hans Koch",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/1093709?v=4",
+      "profile": "https://hans-koch.me",
+      "contributions": [
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,