docs: add missing ng update material command to v19 update guide (angular#58770)

PR Close angular#58770

Author: sp90

adev/src/app/features/update/recommendations.ts

@@ -2405,6 +2405,14 @@ export const RECOMMENDATIONS: Step[] = [
     possibleIn: 1900,
     step: '19.0.0_ng_update',
   },
+  {
+    possibleIn: 1900,
+    necessaryAsOf: 1900,
+    level: ApplicationComplexity.Basic,
+    material: true,
+    step: 'update @angular/material',
+    action: 'Run `ng update @angular/material@19`.',
+  },
   {
     action:
       'Angular directives, components and pipes are now standalone by default. Specify "standalone: false" for declarations that are currently declared in an NgModule. The Angular CLI will automatically update your code to reflect that.',