missing v in front of tag for pulling tag

Signed-off-by: Ryan Cook <[email protected]>

Author: cooktheryan

.github/workflows/llama-stack-build.yaml

@@ -17,7 +17,7 @@ jobs:
       - name: Checkout release tag
         uses: actions/checkout@v4
         with:
-           ref: ${{ inputs.version }}
+           ref: v${{ inputs.version }}
            repository: meta-llama/llama-stack.git
 
       - name: python deps