Bump org.springaicommunity:mcp-client-security from 0.1.5 to 0.1.9 in /conformance-tests/client-spring-http-client in the maven group across 1 directory

Bump org.springaicommunity:mcp-client-security from 0.1.5 to 0.1.9 in /conformance-tests/client-spring-http-client in the maven group across 1 directory #1398