Update docs/spec/draft/threats.md

Co-authored-by: Marcela Melara <[email protected]>
Signed-off-by: Tom Hennen <[email protected]>

docs/spec/draft/threats.md

@@ -872,7 +872,7 @@ The threats described in this document apply recursively to build tooling
 as do the mitigations and examples.  A future
 [Build Environment track](future-directions#build-environment-track) may
 provide more comprehensive guidance on how to address more specfiic
-aspects this threat.
+aspects of this threat.
 
 *Example:* MyPackage is a tarball containing an ELF executable, created by
 running `/usr/bin/tar` during its build process. An adversary compromises the