docs: update .all-contributorsrc [skip ci]

allcontributors[bot] · web-flow · commit 8997a608d13c · 2020-09-10T09:20:02.000Z
diff --git a/.all-contributorsrc b/.all-contributorsrc
@@ -253,6 +253,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "yamagen0915",
+      "name": "yamagen0915",
+      "avatar_url": "https://avatars1.githubusercontent.com/u/2683573?v=4",
+      "profile": "https://github.com/yamagen0915",
+      "contributions": [
+        "bug",
+        "code"
+      ]
     }
   ],
   "contributorsPerLine": 7,
