UI fixes: sentence case (#22865)

- Bug is here:
https://github.com/fleetdm/fleet/issues/22883

frontend/pages/SoftwarePage/SoftwareAddPage/SoftwareAddPage.tsx

@@ -32,7 +32,7 @@ const addSoftwareSubNav: IAddSoftwareSubNavItem[] = [
     pathname: PATHS.SOFTWARE_ADD_APP_STORE,
   },
   {
-    name: "Custom Package",
+    name: "Custom package",
     pathname: PATHS.SOFTWARE_ADD_PACKAGE,
   },
 ];

frontend/pages/admin/IntegrationsPage/cards/MdmSettings/components/AutomaticEnrollmentSection/AutomaticEnrollmentSection.tsx

@@ -32,7 +32,7 @@ const AutomaticEnrollmentSection = ({
   };
 
   return (
-    <SettingsSection title="Automatic Enrollment" className={baseClass}>
+    <SettingsSection title="Automatic enrollment" className={baseClass}>
       {!isPremiumTier ? (
         <PremiumFeatureMessage alignment="left" />
       ) : (