Update README.md

Author: varunsh-coder

README.md

@@ -49,7 +49,7 @@ Harden-Runner monitors process, file, and network activity to:
 
    ```yaml
    steps:
-     - uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
+     - uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
        with:
          egress-policy: audit
    ```