fixup! feat(@angular/cli): add initial set of signal form examples

Author: clydin

packages/angular/cli/lib/examples/signal-forms/07-dynamic-arrays.md

@@ -141,7 +141,6 @@ This file provides the template for the form, using an `@for` block to render th
 ## Usage Notes
 
 - The "Remove" and "Add" buttons have `type="button"` to prevent them from submitting the form.
-- The "Submit" button is disabled based on the form's overall `valid` signal.
 
 ## How to Use This Example
 

packages/angular/cli/lib/examples/signal-forms/16-server-side-validation.md

@@ -145,7 +145,7 @@ This file provides the template, which disables the submit button based on the f
 
 ## Usage Notes
 
-- The submit button is disabled while the form is invalid OR while it is submitting (`[disabled]="!registrationForm().valid() || registrationForm().submitting()"`).
+- The submit button is disabled while the form is submitting (`[disabled]="registrationForm().submitting()"`).
 - The `submit` function automatically sets the form's `submitting` signal to `true` before the async action and `false` after it completes.
 - If the async action returns an array of `ValidationError`, `submit` will automatically find the `field` specified in each error and add the error to that field's `errors` signal.
 

packages/angular/cli/lib/examples/signal-forms/18-custom-aggregate-property.md

@@ -131,7 +131,7 @@ This file provides the template, which reads the custom `warnings` property and
     }
   </div>
 
-  <button type="submit" [disabled]="!registrationForm().valid()">Register</button>
+  <button type="submit">Register</button>
 </form>
 ```