Update .github/copilot-instructions.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: sam0x17

.github/copilot-instructions.md

@@ -22,7 +22,7 @@ When reviewing pull requests, please adhere to and keep in mind the following:
 * There should never be unsafe code in the runtime.
 * You should be extra careful with contributions from external contributors (users without the
   "Nucleus" role)
-* Be extra vigilent for PRs that introduce a security vulnerability or exploit. Always call out
+* Be extra vigilant for PRs that introduce a security vulnerability or exploit. Always call out
   potential security vulnerabilities.
 * Code should be performant and maintainable, with maximum safety and security. $4B market cap
   is on the line.