Updated changelog.

See #3598

src/main/resources/changelog.txt

@@ -1,6 +1,12 @@
 Spring Data MongoDB Changelog
 =============================
 
+Changes in version 3.1.7 (2021-03-31)
+-------------------------------------
+* #3613 - Use StringUtils.replace(…) instead of String.replaceAll(…) for mapKeyDotReplacement.
+* #3609 - SimpleReactiveMongoRepository#saveAll does not populate @Id property if it is immutable.
+
+
 Changes in version 3.2.0-RC1 (2021-03-31)
 -----------------------------------------
 * #3613 - Use StringUtils.replace(…) instead of String.replaceAll(…) for mapKeyDotReplacement.
@@ -3387,5 +3393,6 @@ Repository
 
 
 
+