docs: remove ignore-unfixed from IaC scan example (#429)

Signed-off-by: Nikita Pivkin <[email protected]>

Author: nikpivkin

README.md

@@ -550,7 +550,6 @@ jobs:
           format: 'sarif'
           output: 'trivy-results.sarif'
           exit-code: '1'
-          ignore-unfixed: true
           severity: 'CRITICAL,HIGH'
 
       - name: Upload Trivy scan results to GitHub Security tab