Sync from Piper @395706834

PROTOBUF_SYNC_PIPER
diff --git a/php/src/Google/Protobuf/Value.php b/php/src/Google/Protobuf/Value.php
index 7bebb99..dcc0bdf 100644
--- a/php/src/Google/Protobuf/Value.php
+++ b/php/src/Google/Protobuf/Value.php
@@ -11,8 +11,8 @@
 /**
  * `Value` represents a dynamically typed value which can be either
  * null, a number, a string, a boolean, a recursive struct value, or a
- * list of values. A producer of value is expected to set one of that
- * variants, absence of any variant indicates an error.
+ * list of values. A producer of value is expected to set one of these
+ * variants. Absence of any variant indicates an error.
  * The JSON representation for `Value` is JSON value.
  *
  * Generated from protobuf message <code>google.protobuf.Value</code>