Add Batuhan to team page

Signed-off-by: Batuhan Apaydın <batuhan.apaydin@trendyol.com>
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

Author: developer-guy

_data/members.yml

@@ -10,6 +10,7 @@ core:
 members:
   - vivek
   - utsav
+  - developer-guy
 
 # Listed for several months, GitHub and leaderboard shows former contributors permanently
 former_members:

_staff_members/developer-guy.md

@@ -1,8 +1,9 @@
 ---
 name: Batuhan Apaydın
-position: Guest
+position: Contributor
 image_path: /images/author/developer-guy.png
 linkedin_username: bthnapydin
 github_username: developer-guy
-blurb: Life-long learner. Software engineer at <a href="https://www.trendyol.com">@Trendyol</a>
----
+twitter_username: developerguyba 
+blurb: Guest Author & Arkade Contributor <a href="https://www.trendyol.com/">@Trendyol</a>
+---