add flickr to social integration (cotes2020#2286)

- add flickr to social integration

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Co-authored-by: Yi Su <[email protected]>

Author: nuance1979

_config.yml

@@ -84,6 +84,7 @@ lattes_id: # your ID on Lattes (Brazilian Lattes CV)
 osf_id: # your OSF ID
 research_gate_profile: # your profile on ResearchGate
 scopus_id: # your profile on Scopus
+flickr_id: # your flickr id
 blogger_url: # your blogger URL
 work_url: # work page URL
 keybase_username: # your keybase user name

_includes/social.liquid

@@ -49,6 +49,9 @@
 {% if site.quora_username %}
   <a href="https://www.quora.com/profile/{{ site.quora_username }}" title="Quora"><i class="fa-brands fa-quora"></i></a>
 {% endif %}
+{% if site.flickr_id %}
+  <a href="https://www.flickr.com/{{ site.flickr_id }}" title="Flickr"><i class="fa-brands fa-flickr"></i></a>
+{% endif %}
 {% if site.blogger_url %}
   <a href="{{ site.blogger_url }}" title="Blogger"><i class="fa-brands fa-blogger-b"></i></a>
 {% endif %}