ICU-21249 Bump ant from 1.10.6 to 1.10.8 in /tools/cldr/cldr-to-icu

Bumps ant from 1.10.6 to 1.10.8.

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/tools/cldr/cldr-to-icu/pom.xml b/tools/cldr/cldr-to-icu/pom.xml
index 8bd233f..90c2aa5 100644
--- a/tools/cldr/cldr-to-icu/pom.xml
+++ b/tools/cldr/cldr-to-icu/pom.xml
@@ -99,7 +99,7 @@
         <dependency>
             <groupId>org.apache.ant</groupId>
             <artifactId>ant</artifactId>
-            <version>1.10.6</version>
+            <version>1.10.8</version>
         </dependency>
 
         <!-- Testing only dependencies. -->