build: Ensure all required checks run on merge_group

And clean up some of the whitespace formatting so that the "name" and
"on" are grouped away from the "jobs".

Signed-off-by: Rob Bradford <rbradford@rivosinc.com>

.github/workflows/audit.yaml

@@ -4,6 +4,7 @@ on:
     paths: 
       - '**/Cargo.toml'
       - '**/Cargo.lock'
+
 jobs:
   security_audit:
     name: Audit