build(deps): update bootstrap requirement in the prod-deps group

Updates the requirements on [bootstrap](https://github.com/twbs/bootstrap) to permit the latest version.

Updates `bootstrap` to 5.3.7
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](https://github.com/twbs/bootstrap/compare/v5.3.6...v5.3.7)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-version: 5.3.7
  dependency-type: direct:production
  dependency-group: prod-deps
...

Signed-off-by: dependabot[bot] <support@github.com>

_includes/sidebar.html

@@ -52,13 +52,21 @@
     {% endunless %}
 
     {% for entry in site.data.contact %}
+      {%- assign url = null -%}
+
       {% case entry.type %}
         {% when 'github', 'twitter' %}
+          {%- unless site[entry.type].username -%}
+            {%- continue -%}
+          {%- endunless -%}
           {%- capture url -%}
             https://{{ entry.type }}.com/{{ site[entry.type].username }}
           {%- endcapture -%}
         {% when 'email' %}
-          {% assign email = site.social.email | split: '@' %}
+          {%- unless site.social.email -%}
+            {%- continue -%}
+          {%- endunless -%}
+          {%- assign email = site.social.email | split: '@' -%}
           {%- capture url -%}
             javascript:location.href = 'mailto:' + ['{{ email[0] }}','{{ email[1] }}'].join('@')
           {%- endcapture -%}

package.json

@@ -27,7 +27,7 @@
   },
   "dependencies": {
     "@popperjs/core": "^2.11.8",
-    "bootstrap": "^5.3.6"
+    "bootstrap": "^5.3.8"
   },
   "devDependencies": {
     "@babel/core": "^7.27.1",