Revert "Upgrade to Jackson 2.9.9.20190806"

This reverts commit 81239611a0.

See gh-17698

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -79,7 +79,7 @@
 		<httpcore.version>4.4.11</httpcore.version>
 		<infinispan.version>9.4.15.Final</infinispan.version>
 		<influxdb-java.version>2.15</influxdb-java.version>
-		<jackson.version>2.9.9.20190806</jackson.version>
+		<jackson.version>2.9.9</jackson.version>
 		<jakarta-activation.version>1.2.1</jakarta-activation.version>
 		<jakarta-annotation.version>1.3.4</jakarta-annotation.version>
 		<jakarta-jms.version>2.0.2</jakarta-jms.version>