Add markdown bullet points to 1.6 changelog entries (#198)

CHANGELOG.md

@@ -12,20 +12,20 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 ## [v1.6](https://github.com/bugcrowd/vulnerability-rating-taxonomy/compare/v1.5...v1.6) - 2018-09-13
 ### Added
-broken_access_control.server_side_request_forgery_ssrf.internal_high_impact
-broken_access_control.server_side_request_forgery_ssrf.internal_scan_and_or_medium_impact
-server_security_misconfiguration.mail_server_misconfiguration.no_spoofing_protection_on_email_domain
-server_security_misconfiguration.mail_server_misconfiguration.email_spoofing_to_inbox_due_to_missing_or_misconfigured_dmarc_on_email_domain
-server_security_misconfiguration.mail_server_misconfiguration.email_spoofing_to_spam_folder
-server_security_misconfiguration.mail_server_misconfiguration.missing_or_misconfigured_spf_and_or_dkim
+- broken_access_control.server_side_request_forgery_ssrf.internal_high_impact
+- broken_access_control.server_side_request_forgery_ssrf.internal_scan_and_or_medium_impact
+- server_security_misconfiguration.mail_server_misconfiguration.no_spoofing_protection_on_email_domain
+- server_security_misconfiguration.mail_server_misconfiguration.email_spoofing_to_inbox_due_to_missing_or_misconfigured_dmarc_on_email_domain
+- server_security_misconfiguration.mail_server_misconfiguration.email_spoofing_to_spam_folder
+- server_security_misconfiguration.mail_server_misconfiguration.missing_or_misconfigured_spf_and_or_dkim
 
 ### Removed
-broken_access_control.server_side_request_forgery_ssrf.internal
-server_security_misconfiguration.mail_server_misconfiguration.email_spoofing_on_email_domain
-server_security_misconfiguration.mail_server_misconfiguration.missing_spf_on_non_email_domain
-server_security_misconfiguration.mail_server_misconfiguration.spf_uses_a_soft_fail
-server_security_misconfiguration.mail_server_misconfiguration.spf_includes_10_lookups
-server_security_misconfiguration.mail_server_misconfiguration.missing_dmarc
+- broken_access_control.server_side_request_forgery_ssrf.internal
+- server_security_misconfiguration.mail_server_misconfiguration.email_spoofing_on_email_domain
+- server_security_misconfiguration.mail_server_misconfiguration.missing_spf_on_non_email_domain
+- server_security_misconfiguration.mail_server_misconfiguration.spf_uses_a_soft_fail
+- server_security_misconfiguration.mail_server_misconfiguration.spf_includes_10_lookups
+- server_security_misconfiguration.mail_server_misconfiguration.missing_dmarc
 
 ## [v1.5](https://github.com/bugcrowd/vulnerability-rating-taxonomy/compare/v1.4...v1.5) - 2018-09-13
 ### Added