Mark runtime fields as beta for 7.11 (#5312)

Author: stevejgordon

src/Nest/Mapping/TypeMapping.cs

@@ -98,6 +98,7 @@ public interface ITypeMapping
 
 		/// <summary>
 		/// Specifies runtime fields for the mapping.
+		/// <para>This functionality is in beta and is subject to change. </para>
 		/// </summary>
 		[DataMember(Name = "runtime")]
 		IRuntimeFields RuntimeFields { get; set; }
@@ -269,6 +270,7 @@ public TypeMappingDescriptor<T> DisableIndexField(bool? disabled = true) =>
 		public TypeMappingDescriptor<T> RoutingField(Func<RoutingFieldDescriptor<T>, IRoutingField> routingFieldSelector) =>
 			Assign(routingFieldSelector, (a, v) => a.RoutingField = v?.Invoke(new RoutingFieldDescriptor<T>()));
 
+		/// <inheritdoc cref="ITypeMapping.RuntimeFields" />
 		public TypeMappingDescriptor<T> RuntimeFields(Func<RuntimeFieldsDescriptor<T>, IPromise<IRuntimeFields>> runtimeFieldsSelector) =>
 			Assign(runtimeFieldsSelector, (a, v) => a.RuntimeFields = v?.Invoke(new RuntimeFieldsDescriptor<T>())?.Value);
 

src/Nest/Search/Search/SearchRequest.cs

@@ -182,6 +182,7 @@ public partial interface ISearchRequest : ITypedSearchRequest
 
 		/// <summary>
 		/// Specifies runtime fields which exist only as part of the query.
+		/// <para>This functionality is in beta and is subject to change. </para>
 		/// </summary>
 		[DataMember(Name = "runtime_mappings")]
 		IRuntimeFields RuntimeFields { get; set; }