fix(deps): update dependency org.altcha:altcha to v1.2.0

Author: renovate[bot]

captchaservice-backend/pom.xml

@@ -311,7 +311,7 @@
         <dependency>
             <groupId>org.altcha</groupId>
             <artifactId>altcha</artifactId>
-            <version>1.1.2</version>
+            <version>1.2.0</version>
         </dependency>
         <dependency>
             <groupId>commons-net</groupId>