DOC: Remove Twitter icon in Zarr-Python (#3245)

* DOC: Remove Twitter icon in Zarr-Python

* Added Bluesky and Mastodon icon links

---------

Co-authored-by: Davis Bennett <davis.v.bennett@gmail.com>

Author: star1327p

docs/conf.py

@@ -167,8 +167,17 @@ def skip_submodules(
 # documentation.
 html_theme_options = {
     "github_url": "https://github.com/zarr-developers/zarr-python",
-    "twitter_url": "https://twitter.com/zarr_dev",
     "icon_links": [
+        {
+            "name": "Bluesky",
+            "url": "https://bsky.app/profile/zarr.dev",
+            "icon": "fa-brands fa-bluesky",
+        },
+        {
+            "name": "Mastodon",
+            "url": "https://fosstodon.org/@zarr",
+            "icon": "fa-brands fa-mastodon",
+        },
         {
             "name": "Zarr Dev",
             "url": "https://zarr.dev/",