replace x icon with bluesky in the footer

prompted by a request from @danielskatz in the #website Slack channel

Signed-off-by: Chad Dougherty <[email protected]>

Author: crd477

_config.yml

@@ -31,6 +31,7 @@ hero_line_two: A community of people who make research software happen.
 
 # social media
 twitter: us_rse
+bluesky: us-rse.bsky.social
 github_org: USRSE
 github_repo: usrse.github.io
 linkedin: company/us-rse/

_includes/footer.html

@@ -25,12 +25,12 @@
     <span class="screen-reader-text">Mastodon</span>
 </a>{% endif %}
 
-{% if site.twitter %}<a href="https://twitter.com/{{ site.twitter }}"
+{% if site.bluesky %}<a href="https://bsky.app/profile/{{ site.bluesky }}"
    target="_blank"
    rel="noopener "
   class="button button-icon">
-<svg xmlns="http://www.w3.org/2000/svg" height="32" width="32" viewBox="0 0 512 512"><!--!Font Awesome Free 6.5.0 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free Copyright 2023 Fonticons, Inc.--><path fill="#741654" d="M389.2 48h70.6L305.6 224.2 487 464H345L233.7 318.6 106.5 464H35.8L200.7 275.5 26.8 48H172.4L272.9 180.9 389.2 48zM364.4 421.8h39.1L151.1 88h-42L364.4 421.8z"/></svg>
-    <span class="screen-reader-text">Twitter</span>
+<svg xmlns="http://www.w3.org/2000/svg" height="32" width="32" viewBox="0 0 512 512"><!--!Font Awesome Free 6.7.2 by @fontawesome - https://fontawesome.com License - https://fontawesome.com/license/free Copyright 2025 Fonticons, Inc.--><path fill="#741654" d="M111.8 62.2C170.2 105.9 233 194.7 256 242.4c23-47.6 85.8-136.4 144.2-180.2c42.1-31.6 110.3-56 110.3 21.8c0 15.5-8.9 130.5-14.1 149.2C478.2 298 412 314.6 353.1 304.5c102.9 17.5 129.1 75.5 72.5 133.5c-107.4 110.2-154.3-27.6-166.3-62.9l0 0c-1.7-4.9-2.6-7.8-3.3-7.8s-1.6 3-3.3 7.8l0 0c-12 35.3-59 173.1-166.3 62.9c-56.5-58-30.4-116 72.5-133.5C100 314.6 33.8 298 15.7 233.1C10.4 214.4 1.5 99.4 1.5 83.9c0-77.8 68.2-53.4 110.3-21.8z"/></svg>
+    <span class="screen-reader-text">Bluesky</span>
 </a>{% endif %}
 
 {% if site.youtube %}<a href="https://youtube.com/@{{ site.youtube }}"

assets/css/reboot.css

@@ -2277,6 +2277,18 @@ tr, td, th {
     background-color: #006292;
     color: #fff;
 }
+.btn--bluesky {
+    background-color: #007bb6;
+    color: #fff;
+}
+.btn--bluesky:visited {
+    background-color: #007bb6;
+    color: #fff;
+}
+.btn--bluesky:hover {
+    background-color: #006292;
+    color: #fff;
+}
 .btn--block {
     display: block;
     width: 100%}
@@ -3679,6 +3691,9 @@ body:hover .visually-hidden a, body:hover .visually-hidden input, body:hover .vi
 .social-icons .fa-mastodon {
     color: #2b90d9;
 }
+.social-icons .fa-bluesky {
+    color: #1185fe;
+}
 .social-icons .fa-pinterest, .social-icons .fa-pinterest-p, .social-icons .fa-pinterest-square {
     color: #cb2027;
 }