Update SECURITY.md (#5246)

Based on feedback from @zgfzgf and a few others - recommending that we make this change to offer more clarity on what is meant by security issues (which are not always "Critical" in severity).

SECURITY.md

@@ -2,11 +2,11 @@
 
 ## Reporting a Vulnerability
 
-For *critical* bugs, please consult our Security Policy and Responsible Disclosure Program information at https://github.com/filecoin-project/community/blob/master/SECURITY.md
+For reporting security vulnerabilities/bugs, please consult our Security Policy and Responsible Disclosure Program information at https://github.com/filecoin-project/community/blob/master/SECURITY.md. Security vulnerabilities should be reported via our [Vulnerability Reporting channels](https://github.com/filecoin-project/community/blob/master/SECURITY.md#vulnerability-reporting) and will be eligible for a [Bug Bounty](https://security.filecoin.io/bug-bounty/).
 
 Please try to provide a clear description of any bugs reported, along with how to reproduce the bug if possible. More detailed bug reports (especially those with a PoC included) will help us move forward much faster. Additionally, please avoid reporting bugs that already have open issues. Take a moment to search the issue list of the related GitHub repositories before writing up a new report.
 
-Here are some examples of bugs we would consider 'critical':
+Here are some examples of bugs we would consider to be security vulnerabilities:
 
 * If you can spend from a `multisig` wallet you do not control the keys for.
 * If you can cause a miner to be slashed without them actually misbehaving.
@@ -16,8 +16,8 @@ Here are some examples of bugs we would consider 'critical':
 * If you can craft a message that causes a persistent fork in the network.
 * If you can cause the total amount of Filecoin in the network to no longer be 2 billion.
 
-This is not an exhaustive list, but should provide some idea of what we consider 'critical'.
+This is not an exhaustive list, but should provide some idea of what we consider as a security vulnerability, . 
 
 ## Reporting a non security bug
 
-For non-critical bugs, please simply file a GitHub [issue](https://github.com/filecoin-project/lotus/issues/new?template=bug_report.md). 
+For non-security bugs, please simply file a GitHub [issue](https://github.com/filecoin-project/lotus/issues/new?template=bug_report.md).