remove mastodon, update photo, deprecate D4RL, update team

_config.yml

@@ -25,7 +25,6 @@ description: >-
   Maintaining The World's Open Source Reinforcement Learning Tools
 
 github: https://github.com/Farama-Foundation
-mastodon: https://mastodon.social/@faramafound
 twitter: https://twitter.com/FaramaFound
 reddit: https://www.reddit.com/r/farama/
 discord: https://discord.gg/PfR7a79FpQ

_data/projects.yml

@@ -80,13 +80,6 @@
   type: incubating
   pip: ale-py
 
-- name: D4RL
-  github: https://github.com/Farama-Foundation/D4RL
-  website:
-  desc: A collection of reference environments for offline reinforcement learning
-  image: d4rl.svg
-  type: incubating
-
 - name: Procgen2
   github: https://github.com/Farama-Foundation/procgen2
   website:

_data/team.yml

@@ -53,7 +53,7 @@
   site: https://github.com/ffelten
 
 - name: Bolun Dai
-  role: Miniworld and Minigrid Project Manager
+  role: Miniworld and Minigrid Project Manager and MPE2 Maintainer
   affiliation: New York University
   image: bolun.jpg
   site: https://github.com/BolunDai0216

_includes/footer.html

@@ -16,8 +16,6 @@
                     </div>
                 </div>
                 <div class="farama-social-container mt-4 mt-md-3 justify-content-center">
-                    <span class="px-2 py-2"><a href="{{site.mastodon}}" aria-label="Twitter"><i
-                                class="fa-brands fa-mastodon fa-2x fa-fw" style="color: white;"></i></a></span>
                     <span class="px-2 py-2"><a href="{{site.twitter}}" aria-label="Twitter"><i
                                 class="fa fa-twitter fa-2x fa-fw" style="color: white;"></i></a></span>
                     <span class="px-2 py-2"><a href="{{site.github}}" aria-label="Github"><i