Update _config.yml

Author: macartan

_config.yml

@@ -67,10 +67,10 @@ og_image: # The site-wide (default for all links) Open Graph preview image
 
 github_username: macartan # your GitHub user name
 gitlab_username: # your GitLab user name
-twitter_username: maqartan # your Twitter handle
-linkedin_username: # your LinkedIn user name
+twitter_username:  # your Twitter handle
+linkedin_username: Macartan Humphreys # your LinkedIn user name
 scholar_userid: NGNhTDoAAAAJ # your Google Scholar ID
-mastodon_username: sciences.social/@macartan # your mastodon instance+username in the format  instance.tld/@username
+mastodon_username: # sciences.social/@macartan # your mastodon instance+username in the format  instance.tld/@username
 semanticscholar_id: # your Semantic Scholar ID
 orcid_id: 0000-0001-7029-2326 # your ORCID ID
 medium_username: # your Medium username