Revert "Update email address"

This reverts commit 9872f7c46f.
Because I can use my personal email now.

_config.yml

@@ -67,9 +67,9 @@ author:
     - label: "@sahinakkayadev"
       icon: "fab fa-fw fa-twitter-square"
       url: "https://twitter.com/sahinakkayadev"
-    - label: "sahin1akkaya@gmail.com"
+    - label: "sahin@sahinakkaya.dev"
       icon: "fas fa-fw fa-envelope"
-      url: "mailto:sahin1akkaya@gmail.com"
+      url: "mailto:sahin@sahinakkaya.dev"
     - label: "Resume"
       icon: "fas fa-fw fa-id-card"
       url: "/assets/docs/resume.pdf"

contact.markdown

@@ -7,4 +7,4 @@ You can contact me via:
 
 - Telegram: <a href="https://t.me/sahinakkaya">@sahinakkaya</a>
 - Matrix: <a href="https://matrix.to/#/@sahinakkaya:matrix.org">sahinakkaya:matrix.org</a>  
-- E-mail: <a href="mailto:sahin1akkaya@gmail.com">sahin1akkaya@gmail.com</a>
+- E-mail: <a href="mailto:sahin@sahinakkaya.dev">sahin@sahinakkaya.dev</a>