docs: escape interpolation brackets

docs/en/UI/Angular/Form-Validation.md

@@ -19,7 +19,7 @@ import { VALIDATION_BLUEPRINTS } from "@ngx-validate/core";
     {
       provide: VALIDATION_BLUEPRINTS,
       useValue: {
-        uniqueUsername: "::AlreadyExists[{{ username }}]",
+        uniqueUsername: "::AlreadyExists[{%{{{ username }}}%}]",
       },
     },
   ],
@@ -104,7 +104,7 @@ import { ChangeDetectionStrategy, Component } from "@angular/core";
       class="font-weight-bold font-italic px-1 invalid-feedback"
       *ngFor="let error of abpErrors; trackBy: trackByFn"
     >
-      {{ error.message | abpLocalization: error.interpoliteParams }}
+      {%{{{ error.message | abpLocalization: error.interpoliteParams }}}%}
     </div>
   `,
   changeDetection: ChangeDetectionStrategy.OnPush,