Updating change logs

Author: deannagarcia

CHANGES.txt

@@ -1,3 +1,7 @@
+2021-05-25 version 3.17.2 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
+  Kotlin
+  * Fix duplicate class error
+
 2021-05-07 version 3.17.1 (C++/Java/Python/PHP/Objective-C/C#/Ruby/JavaScript)
   PHP
   * Fixed PHP memory leaks and arginfo errors. (#8614)

php/ext/google/protobuf/package.xml

@@ -22,9 +22,7 @@
  </stability>
  <license uri="https://opensource.org/licenses/BSD-3-Clause">3-Clause BSD License</license>
  <notes>
- * Fixed PHP memory leaks and arginfo errors. (#8614)
- * Fixed JSON parser to allow multiple values from the same oneof as long as
-   all but one are null.
+ * No new changes in 3.17.2
  </notes>
  <contents>
   <dir baseinstalldir="/" name="/">