Updated Spring Core version to 5.3.6

Author: Lyor Goldstein

pom.xml

@@ -107,7 +107,7 @@
         <bouncycastle.version>1.68</bouncycastle.version>
         <slf4j.version>1.7.30</slf4j.version>
         <logback.version>1.2.3</logback.version>        
-        <spring.version>5.3.5</spring.version>
+        <spring.version>5.3.6</spring.version>
         <jgit.version>5.11.0.202103091610-r</jgit.version>
         <junit.version>4.13.2</junit.version>
         <bytebuddy.version>1.10.22</bytebuddy.version>