[fix] Removes `/>` ending tags for void HTML elements

Removes ``/>`` ending tags for void elements [1] and replaces them with ``>``.
Part of the larger cleanup to cleanup invalid HTML throughout the codebase [2].

[1] https://html.spec.whatwg.org/multipage/syntax.html#void-elements
[2] https://github.com/searxng/searxng/issues/3793

searx/templates/simple/result_templates/map.html

@@ -18,12 +18,12 @@
                 <span itemprop="streetAddress">
                     {%- if result.address.house_number -%}{{- result.address.house_number -}}, {% endif %}
                     {{- result.address.road -}}
-                </span><br/>
+                </span><br>
             {%- endif %}
             {%- if result.address.locality -%}
                 <span itemprop="addressLocality">{{- result.address.locality -}}</span>
                 {%- if result.address.postcode -%}, <span itemprop="postalCode">{{- result.address.postcode -}}</span>{% endif %}
-                <br/>
+                <br>
             {%- endif -%}
             {%- if result.address.country -%}
                 <span itemprop="addressCountry">{{- result.address.country -}}</span>