Update dependency org.cactoos:cactoos to v0.56.1

Author: renovate[bot]

pom.xml

@@ -206,7 +206,7 @@ software.
     <dependency>
       <groupId>org.cactoos</groupId>
       <artifactId>cactoos</artifactId>
-      <version>0.54.0</version>
+      <version>0.56.1</version>
     </dependency>
     <dependency>
       <groupId>log4j</groupId>