docs: add antoinesaget as a contributor for doc (#17559)

Adds @antoinesaget as a contributor for doc.

This was requested by stavros-k [in this
comment](https://github.com/truecharts/charts/pull/17316#issuecomment-1913129965)

[skip ci]

---------

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

.all-contributorsrc

@@ -2236,6 +2236,15 @@
       "contributions": [
         "code"
       ]
+    },
+    {
+      "login": "antoinesaget",
+      "name": "Antoine Saget",
+      "avatar_url": "https://avatars.githubusercontent.com/u/38580521?v=4",
+      "profile": "https://github.com/antoinesaget",
+      "contributions": [
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7,