[BUGFIX] Update outdated documentation

Resolves: #738

Author: einpraegsam

Documentation/ForDevelopers/WriteOwnValidators.md

@@ -420,7 +420,7 @@ The example fluid template (partial):
 
 <div class="powermail_fieldwrap powermail_fieldwrap_type_emailverification powermail_fieldwrap_{field.marker} {field.css} {settings.styles.framework.fieldAndLabelWrappingClasses}">
 	<label for="powermail_field_{field.marker}" class="{settings.styles.framework.labelClasses}" title="{field.description}">
-		<vh:string.RawAndRemoveXss>{field.title}</vh:string.RawAndRemoveXss><f:if condition="{field.mandatory}"><span class="mandatory">*</span></f:if>
+		<vh:string.escapeLabels>{field.title}</vh:string.escapeLabels><f:if condition="{field.mandatory}"><span class="mandatory">*</span></f:if>
 	</label>
 
 	<div class="{settings.styles.framework.fieldWrappingClasses}">