chore(deps): update dependency commons-codec:commons-codec to v1.21.0 (#1723)

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

Author: renovate[bot]

tools/flagd-core/pom.xml

@@ -84,7 +84,7 @@
         <dependency>
             <groupId>commons-codec</groupId>
             <artifactId>commons-codec</artifactId>
-            <version>1.20.0</version>
+            <version>1.21.0</version>
         </dependency>
 
         <dependency>