Update javadoc badge for 2.10.0
Update javadoc badge for 2.10.0

Signed-off-by: Simon Bennetts <86dd6fc569bc24d96c23727e2734cc63308a81de@gmail.com>
zaproxy/zaproxy,kingthorin/zaproxy,kingthorin/zaproxy,thc202/zaproxy,thc202/zaproxy,psiinon/zaproxy,psiinon/zaproxy,zaproxy/zaproxy,zaproxy/zaproxy,thc202/zaproxy,kingthorin/zaproxy,thc202/zaproxy,zaproxy/zaproxy,zaproxy/zaproxy,kingthorin/zaproxy,psiinon/zaproxy,kingthorin/zaproxy,psiinon/zaproxy,zaproxy/zaproxy,zaproxy/zaproxy,psiinon/zaproxy,thc202/zaproxy,kingthorin/zaproxy,psiinon/zaproxy,thc202/zaproxy,kingthorin/zaproxy,thc202/zaproxy,psiinon/zaproxy