Change Rocky Linux version to 8.10

dockerfiles/rocky/is/Dockerfile

@@ -17,10 +17,15 @@
 # ------------------------------------------------------------------------
 
 # set base Docker image to CentOS Docker image
-FROM rockylinux:9.3
+FROM rockylinux:8
 LABEL maintainer="WSO2 Docker Maintainers <[email protected]>" \
       com.wso2.docker.source="https://github.com/wso2/docker-is/releases/tag/v6.0.0.1"
 
+# Update the system to the specific 8.10 version
+RUN dnf -y update && \
+    dnf -y distro-sync && \
+    dnf clean all
+
 # Install necessary locale packages
 RUN yum install -y glibc-langpack-en && \
     yum install -y langpacks-en glibc-locale-source && \