Update spring core to v5.3.31 (#1769)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle.properties

@@ -13,7 +13,7 @@ commonsValidatorVersion=1.7
 hibernateVersion=5.6.15.Final
 servletApiVersion=4.0.1
 spockVersion=2.1-groovy-3.0
-springVersion=5.3.30
+springVersion=5.3.31
 caffeineVersion=2.9.3
 grailsVersion=6.1.0
 grailsAsyncVersion=4.0.0