[Landing] Minor improvements to the top banner

Author: Andrey Cheptsov

docs/assets/stylesheets/extra.css

@@ -1539,7 +1539,7 @@ html .md-footer-meta.md-typeset a:is(:focus,:hover) {
 .md-typeset.md-banner__inner a {
     color: var(--md-default-bg-color);
     /* border-bottom: 1.5px dotted; */
-    font-weight: 600;
+    font-weight: 500;
 }
 
 .md-typeset.md-banner__inner .md-banner__button svg {

docs/overrides/main.html

@@ -191,7 +191,7 @@
 {% endblock %}
 
 {% block announce %}
-<a href="/blog/agentic-orchestration/" target="_blank">Let agents orchestrate infrastructure and operate workloads <span class="icon"><svg viewBox="0 0 13 10" xmlns="http://www.w3.org/2000/svg"><path d="M12.823 4.164L8.954.182a.592.592 0 0 0-.854 0 .635.635 0 0 0 0 .88l2.836 2.92H.604A.614.614 0 0 0 0 4.604c0 .344.27.622.604.622h10.332L8.1 8.146a.635.635 0 0 0 0 .88.594.594 0 0 0 .854 0l3.869-3.982a.635.635 0 0 0 0-.88z" fill-rule="nonzero" fill="currentColor" class="fill-main"></path></svg></span></a>
+<a href="/blog/agentic-orchestration/" target="_blank">Let agents manage infra and orchestrate workloads <span class="icon"><svg viewBox="0 0 13 10" xmlns="http://www.w3.org/2000/svg"><path d="M12.823 4.164L8.954.182a.592.592 0 0 0-.854 0 .635.635 0 0 0 0 .88l2.836 2.92H.604A.614.614 0 0 0 0 4.604c0 .344.27.622.604.622h10.332L8.1 8.146a.635.635 0 0 0 0 .88.594.594 0 0 0 .854 0l3.869-3.982a.635.635 0 0 0 0-.88z" fill-rule="nonzero" fill="currentColor" class="fill-main"></path></svg></span></a>
 {% endblock %}
 
 {% block footer %}