Update SECURITY.md

Update SECURITY.md based on comments and to remove email reporting option and use GitHub Security Advisory only

SECURITY.md

@@ -2,9 +2,7 @@
 The TFTP Server Daemon project takes security bugs in this repository seriously. Your efforts to responsibly disclose your findings is appreciated, and we will make every effort to acknowledge your contributions.
 
 ## Reporting a Vulnerability
-To report a security issue, please use one of the following methods:
-- **GitHub Security Advisory:** Use the GitHub Security Advisory ["Report a Vulnerability"](https://github.com/altugbakan/rs-tftpd/security/advisories/new) tab on our GitHub repository.
-- **Send an Email:** Send your report to [email protected]. Encrypting the email is recommended, if possible.
+To report a security issue, please use the GitHub Security Advisory ["Report a Vulnerability"](https://github.com/altugbakan/rs-tftpd/security/advisories/new) tab on our GitHub repository.
 
 Please **DO NOT** use public channels (e.g., GitHub issues) for initial reporting of bona fide security vulnerabilities.
 Once you report a security issue, a reviewer will respond with the next steps. After the initial reply, you will be kept informed of the progress towards a fix and any forthcoming announcements. The reviewer may ask for additional information or guidance during this process. If we determine that your report does not constitute a genuine security vulnerability, you will be informed and the report will be closed. Your report may be turned into an issue for further tracking.