Mention help update in CONTRIBUTING
Mention help update in CONTRIBUTING

Mention that the help should be updated accordingly to the changes done.

Signed-off-by: thc202 <43af82ef30812a20fbcf38b99a6f72cdd3a89ac1@gmail.com>

thc202/zap-extensions,kingthorin/zap-extensions,secdec/zap-extensions,denniskniep/zap-extensions,psiinon/zap-extensions,zaproxy/zap-extensions,zaproxy/zap-extensions,veggiespam/zap-extensions,zaproxy/zap-extensions,secdec/zap-extensions,secdec/zap-extensions,zaproxy/zap-extensions,veggiespam/zap-extensions,denniskniep/zap-extensions,kingthorin/zap-extensions,thc202/zap-extensions,zaproxy/zap-extensions,thc202/zap-extensions,kingthorin/zap-extensions,psiinon/zap-extensions,veggiespam/zap-extensions,zapbot/zap-extensions,veggiespam/zap-extensions,secdec/zap-extensions,denniskniep/zap-extensions,secdec/zap-extensions,secdec/zap-extensions,thc202/zap-extensions,zapbot/zap-extensions,zapbot/zap-extensions,kingthorin/zap-extensions,zapbot/zap-extensions,thc202/zap-extensions,kingthorin/zap-extensions,psiinon/zap-extensions,kingthorin/zap-extensions,zapbot/zap-extensions,zaproxy/zap-extensions,psiinon/zap-extensions,denniskniep/zap-extensions,psiinon/zap-extensions,thc202/zap-extensions,zapbot/zap-extensions,denniskniep/zap-extensions,veggiespam/zap-extensions,veggiespam/zap-extensions,denniskniep/zap-extensions,psiinon/zap-extensions,secdec/zap-extensions