docs: add AddeusExMachina as a contributor for code (#2625)

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

* docs: update README.md [skip ci]

* docs: update .all-contributorsrc [skip ci]

---------

Co-authored-by: allcontributors[bot] <46447321+allcontributors[bot]@users.noreply.github.com>
Co-authored-by: Ilkka Seppälä <iluwatar@users.noreply.github.com>

.all-contributorsrc

@@ -2632,6 +2632,16 @@
       "contributions": [
         "doc"
       ]
+    },
+    {
+      "login": "AddeusExMachina",
+      "name": "Antonio Addeo",
+      "avatar_url": "https://avatars.githubusercontent.com/u/39912670?v=4",
+      "profile": "https://github.com/AddeusExMachina",
+      "contributions": [
+        "doc",
+        "code"
+      ]      
     }
   ],
   "contributorsPerLine": 7,