regextester: Prepare release v1
regextester: Prepare release v1

Update changelog with release date and link to tag

Signed-off-by: kingthorin <83ea41af2b636790c02743e48206546e1fa891e4@users.noreply.github.com>
zapbot/zap-extensions,zaproxy/zap-extensions,kingthorin/zap-extensions,thc202/zap-extensions,denniskniep/zap-extensions,veggiespam/zap-extensions,veggiespam/zap-extensions,kingthorin/zap-extensions,kingthorin/zap-extensions,veggiespam/zap-extensions,thc202/zap-extensions,denniskniep/zap-extensions,veggiespam/zap-extensions,secdec/zap-extensions,veggiespam/zap-extensions,thc202/zap-extensions,zapbot/zap-extensions,secdec/zap-extensions,zapbot/zap-extensions,thc202/zap-extensions,zaproxy/zap-extensions,zapbot/zap-extensions,denniskniep/zap-extensions,zaproxy/zap-extensions,psiinon/zap-extensions,secdec/zap-extensions,psiinon/zap-extensions,kingthorin/zap-extensions,zaproxy/zap-extensions,psiinon/zap-extensions,thc202/zap-extensions,secdec/zap-extensions,psiinon/zap-extensions,denniskniep/zap-extensions,zapbot/zap-extensions,zapbot/zap-extensions,psiinon/zap-extensions,denniskniep/zap-extensions,kingthorin/zap-extensions,secdec/zap-extensions,kingthorin/zap-extensions,zaproxy/zap-extensions,denniskniep/zap-extensions,thc202/zap-extensions,zaproxy/zap-extensions,veggiespam/zap-extensions,secdec/zap-extensions,secdec/zap-extensions,psiinon/zap-extensions