ci: fix code freeze (#506)

Signed-off-by: oliver könig <okoenig@nvidia.com>

Author: ko3n1g

.github/workflows/release-freeze.yml

@@ -16,7 +16,7 @@ on:
         default: main
 jobs:
   code-freeze:
-    uses: NVIDIA/NeMo-FW-CI-templates/.github/workflows/_code_freeze.yml@v0.17.3
+    uses: NVIDIA/NeMo-FW-CI-templates/.github/workflows/_code_freeze.yml@v0.21.6
     with:
       library-name: NeMo-Aligner
       python-package: nemo_aligner