chore: update Dockerfile

Author: yutaro-sakamoto

Dockerfile

@@ -45,7 +45,7 @@ RUN cd /root/ && \
 # Runtime stage
 FROM almalinux:9
 
-ARG opensource_COBOL_4J_version=1.1.12 Open_COBOL_ESQL_4J_version=1.1.1
+ARG opensource_COBOL_4J_version=dummy_value Open_COBOL_ESQL_4J_version=dummy_value
 
 SHELL ["/bin/bash", "-c"]