[doc] Update contributors

* Add @koalalam as a contributor
* Update @OlegAndreych as a contributor
* Add @garydgregory as a contributor
* Add @vanguard-1024 as a contributor
* Update @abyss638 as a contributor
* Update @dykov as a contributor
* Add @ewantempero as a contributor
* Update @JerritEic as a contributor
* Add @cbfiddle as a contributor
* Add @MartGit as a contributor
* Update @gredler as a contributor
* Add @Alexx-G as a contributor
* Update @jborgers as a contributor

.all-contributorsrc

@@ -3270,7 +3270,8 @@
       "profile": "https://github.com/jborgers",
       "contributions": [
         "bug",
-        "code"
+        "code",
+        "talk"
       ]
     },
     {
@@ -6523,7 +6524,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/36415196?v=4",
       "profile": "https://github.com/dykov",
       "contributions": [
-        "code"
+        "code",
+        "bug"
       ]
     },
     {
@@ -6541,7 +6543,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/178883?v=4",
       "profile": "https://github.com/gredler",
       "contributions": [
-        "code"
+        "code",
+        "bug"
       ]
     },
     {
@@ -6560,7 +6563,8 @@
       "profile": "https://github.com/JerritEic",
       "contributions": [
         "code",
-        "doc"
+        "doc",
+        "bug"
       ]
     },
     {
@@ -6778,7 +6782,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/90252673?v=4",
       "profile": "https://github.com/abyss638",
       "contributions": [
-        "code"
+        "code",
+        "bug"
       ]
     },
     {
@@ -6842,7 +6847,8 @@
       "avatar_url": "https://avatars.githubusercontent.com/u/2041351?v=4",
       "profile": "https://github.com/OlegAndreych",
       "contributions": [
-        "code"
+        "code",
+        "bug"
       ]
     },
     {
@@ -6871,6 +6877,69 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "koalalam",
+      "name": "koalalam",
+      "avatar_url": "https://avatars.githubusercontent.com/u/5452429?v=4",
+      "profile": "https://github.com/koalalam",
+      "contributions": [
+        "bug"
+      ]
+    },
+    {
+      "login": "garydgregory",
+      "name": "Gary Gregory",
+      "avatar_url": "https://avatars.githubusercontent.com/u/1187639?v=4",
+      "profile": "https://github.com/garydgregory",
+      "contributions": [
+        "bug"
+      ]
+    },
+    {
+      "login": "vanguard-1024",
+      "name": "Austin",
+      "avatar_url": "https://avatars.githubusercontent.com/u/87691060?v=4",
+      "profile": "https://github.com/vanguard-1024",
+      "contributions": [
+        "bug"
+      ]
+    },
+    {
+      "login": "ewantempero",
+      "name": "Ewan Tempero",
+      "avatar_url": "https://avatars.githubusercontent.com/u/8744237?v=4",
+      "profile": "http://www.cs.auckland.ac.nz/~ewan",
+      "contributions": [
+        "bug"
+      ]
+    },
+    {
+      "login": "cbfiddle",
+      "name": "cbfiddle",
+      "avatar_url": "https://avatars.githubusercontent.com/u/6628505?v=4",
+      "profile": "https://github.com/cbfiddle",
+      "contributions": [
+        "bug"
+      ]
+    },
+    {
+      "login": "MartGit",
+      "name": "MartGit",
+      "avatar_url": "https://avatars.githubusercontent.com/u/1518723?v=4",
+      "profile": "https://github.com/MartGit",
+      "contributions": [
+        "bug"
+      ]
+    },
+    {
+      "login": "Alexx-G",
+      "name": "Alex",
+      "avatar_url": "https://avatars.githubusercontent.com/u/3869268?v=4",
+      "profile": "https://github.com/Alexx-G",
+      "contributions": [
+        "bug"
+      ]
     }
   ],
   "contributorsPerLine": 7,