Fix SO message and fix search text

src/registrar/admin.py

@@ -2957,7 +2957,7 @@ class PortfolioAdmin(ListHeaderAdmin):
 
     list_display = ("organization_name", "organization_type", "federal_type", "creator")
     search_fields = ["organization_name"]
-    search_help_text = "Search by portfolio organization."
+    search_help_text = "Search by organization name."
     readonly_fields = [
         # This is the created_at field
         "created_on",

src/registrar/assets/js/get-gov-admin.js

@@ -978,7 +978,7 @@ function initializeWidgetOnList(list, parentId) {
                         $seniorOfficial.val("").trigger("change");
                     }else {
                         // Show the "create one now" text if this field is none in readonly mode.
-                        readonlySeniorOfficial.innerHTML = '<a href="admin/registrar/seniorofficial/add/">No senior official has been found. Create one now.</a>'
+                        readonlySeniorOfficial.innerHTML = '<a href="admin/registrar/seniorofficial/add/">No senior official found. Create one now.</a>'
                     }
                     console.warn("Record not found: " + data.error);
                 }else {

src/registrar/templates/django/admin/includes/portfolio/portfolio_fieldset.html

@@ -27,7 +27,7 @@
         {% else %}
             {% url "admin:registrar_seniorofficial_add" as url %}
             <div class="readonly">
-                <a href={{ url }}>No senior official has been found. Create one now.</a>
+                <a href={{ url }}>No senior official found. Create one now.</a>
             </div>
         {% endif %}
     {% else %}