ci: bump _release_library.yml to v1.4.3

Keep the reusable release workflow pinned to the latest FW-CI-templates
tag (v1.4.3).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: oliver könig <okoenig@nvidia.com>

Author: ko3n1g

.github/workflows/release.yml

@@ -63,7 +63,7 @@ concurrency:
 jobs:
   release:
     if: '!cancelled()'
-    uses: NVIDIA-NeMo/FW-CI-templates/.github/workflows/_release_library.yml@v1.4.0
+    uses: NVIDIA-NeMo/FW-CI-templates/.github/workflows/_release_library.yml@v1.4.3
     with:
       release-ref: ${{ inputs.release-ref || github.sha }}
       python-package: nemo_run