Add mastodon badges

Author: jasongrout

_includes/biocard.html

@@ -21,6 +21,9 @@
       {% if include.linkedin %}
         <a href="{{ include.linkedin }}" rel="noopener noreferrer"><img src="/assets/badges/linkedin.png" alt="LinkedIn"></a>
       {% endif %}
+      {% if include.mastodon %}
+        <a href="{{ include.mastodon }}" rel="noopener noreferrer"><img src="/assets/badges/mastodon.svg" alt="Mastodon"></a>
+      {% endif %}
       {% if include.twitter_handle %}
         <a href="https://twitter.com/{{ include.twitter_handle }}" rel="noopener noreferrer"><img src="/assets/badges/twitter.svg" alt="Twitter"></a>
       {% endif %}

about.html

@@ -496,6 +496,7 @@ <h2 class="text-center">Executive Council Members</h2>
                 gh_handle=bio.gh_handle
                 linkedin=bio.linkedin
                 twitter_handle=bio.twitter_handle
+                mastodon=bio.mastodon
             %}
         {% endfor %}
         </div>
@@ -519,6 +520,7 @@ <h2 class="text-center">Software Steering Council Members</h2>
                 gh_handle=bio.gh_handle
                 linkedin=bio.linkedin
                 twitter_handle=bio.twitter_handle
+                mastodon=bio.mastodon
                 subproject=bio.subproject
             %}
         {% endfor %}
@@ -546,6 +548,7 @@ <h3>2021 Cohort</h3>
             gh_handle=bio.gh_handle
             linkedin=bio.linkedin
             twitter_handle=bio.twitter_handle
+            mastodon=bio.mastodon
         %}
       {% endfor %}
       </div>
@@ -561,6 +564,7 @@ <h3>2020 Cohort</h3>
             gh_handle=bio.gh_handle
             linkedin=bio.linkedin
             twitter_handle=bio.twitter_handle
+            mastodon=bio.mastodon
         %}
       {% endfor %}
       </div>
@@ -575,6 +579,7 @@ <h3>Special Election Cohort</h3>
             gh_handle=bio.gh_handle
             linkedin=bio.linkedin
             twitter_handle=bio.twitter_handle
+            mastodon=bio.mastodon
         %}
       {% endfor %}
       </div>
@@ -589,6 +594,7 @@ <h3>Inaugural Cohort (Former Steering Council Members)</h3>
             gh_handle=bio.gh_handle
             linkedin=bio.linkedin
             twitter_handle=bio.twitter_handle
+            mastodon=bio.mastodon
         %}
       {% endfor %}
       </div>
@@ -612,6 +618,7 @@ <h2 class="text-center">Trademark Subcommittee Members</h2>
                 gh_handle=bio.gh_handle
                 linkedin=bio.linkedin
                 twitter_handle=bio.twitter_handle
+                mastodon=bio.mastodon
             %}
         {% endfor %}
         </div>