Fix some markdown formatting.

Author: Julian

.github/SECURITY.md

@@ -2,20 +2,12 @@
 
 ## Supported Versions
 
-In general, only the latest released ``jsonschema`` version is supported
-and will receive updates.
+In general, only the latest released `jsonschema` version is supported and will receive updates.
 
 ## Reporting a Vulnerability
 
-To report a security vulnerability, please send an email to
-``[email protected]`` with subject line ``SECURITY
-(jsonschema)``.
+To report a security vulnerability, please send an email to `[email protected]` with subject line `SECURITY (jsonschema)`.
+I will do my best to respond within 48 hours to acknowledge the message and discuss further steps.
+If the vulnerability is accepted, an advisory will be sent out via GitHub's security advisory functionality.
 
-I will do my best to respond within 48 hours to acknowledge the message
-and discuss further steps.
-
-If the vulnerability is accepted, an advisory will be sent out via
-GitHub's security advisory functionality.
-
-For non-sensitive discussion related to this policy itself, feel free to
-open an issue on the issue tracker.
+For non-sensitive discussion related to this policy itself, feel free to open an issue on the issue tracker.