[CALCITE-4974] Upgrade log4j2 version to 2.17.1

The 2.17.1 contains a fix for CVE-2021-44832 (security vulnerability)
and other minor improvements.
diff --git a/gradle.properties b/gradle.properties
index 4fa2502..81c3199 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -72,7 +72,7 @@
 jetty.version=9.4.44.v20210927
 junit.version=4.12
 kerby.version=1.1.1
-log4j2.version=2.17.0
+log4j2.version=2.17.1
 mockito.version=2.23.4
 protobuf.version=3.17.1
 scott-data-hsqldb.version=0.1