Update docs

Author: awln-temporal

chasm/search_attribute.go

@@ -448,6 +448,8 @@ func NewSearchAttributesMap(values map[string]VisibilityValue) SearchAttributesM
 // The return type T is inferred from the SearchAttribute's type parameter.
 // For example, SearchAttriteBool will return a bool value.
 // If the value is not found, the zero value for the type T is returned and the second return value is false.
+// Before casting the VisibilityValue to the target type, the value is checked to ensure it is of the correct type.
+// If the value is found but the type does not match, the zero value for the type T is returned and the second return value is false.
 func Get[T any](m SearchAttributesMap, sa typedSearchAttribute[T]) (val T, ok bool) {
 	var zero T
 	if m.values == nil {