Change User management to Domain managers

src/registrar/templates/domain_detail.html

@@ -52,7 +52,7 @@
       {% include "includes/summary_item.html" with title='Security email' value='None provided' edit_link=url %}
     {% endif %}
     {% url 'domain-users' pk=domain.id as url %}
-    {% include "includes/summary_item.html" with title='User management' users='true' list=True value=domain.permissions.all edit_link=url %}
+    {% include "includes/summary_item.html" with title='Domain managers' users='true' list=True value=domain.permissions.all edit_link=url %}
 
   </div>
 {% endblock %}  {# domain_content #}

src/registrar/templates/domain_sidebar.html

@@ -100,7 +100,7 @@
         <a href="{{ url }}"
           {% if request.path|startswith:url %}class="usa-current"{% endif %}
         >
-            User management
+            Domain managers
         </a>
       </li>
     </ul>

src/registrar/templates/domain_users.html

@@ -1,10 +1,23 @@
 {% extends "domain_base.html" %}
 {% load static %}
 
-{% block title %}User management | {{ domain.name }} | {% endblock %}
+{% block title %}Domain managers | {{ domain.name }} | {% endblock %}
 
 {% block domain_content %}
-  <h1>User management</h1>
+  <h1>Domain managers</h1>
+
+  <p>
+  Domain managers can update all information related to a domain within the
+  .gov registrar, including contact details, authorizing official, security
+  email, and DNS name servers.
+  </p>
+
+  <ul>
+    <li>There is no limit to the number of domain managers you can add.</li>
+    <li>After adding a domain manager, an email invitation will be sent to that user with
+      instructions on how to set up an account.</li>
+    <li>To remove a domain manager, <a href="{% public_site_url 'contact/' %}" class="usa-link">contact us</a> for assistance.
+  </ul>
 
   {% if domain.permissions %}
   <section class="section--outlined">

src/registrar/tests/test_views.py

@@ -1204,7 +1204,7 @@ class TestDomainUserManagement(TestDomainOverview):
         response = self.client.get(
             reverse("domain-users", kwargs={"pk": self.domain.id})
         )
-        self.assertContains(response, "User management")
+        self.assertContains(response, "Domain managers")
 
     def test_domain_user_management_add_link(self):
         """Button to get to user add page works."""

src/registrar/views/domain.py

@@ -656,7 +656,7 @@ class DomainSecurityEmailView(DomainFormBaseView):
 
 
 class DomainUsersView(DomainBaseView):
-    """User management page in the domain details."""
+    """Domain managers page in the domain details."""
 
     template_name = "domain_users.html"