Update action.yml - fix CHANNEL check (#5974)

Seeing issue that nightly branch trying to use test auth:

https://github.com/pytorch/vision/actions/runs/11971829405/job/33403106608#step:19:185

.github/actions/binary-upload/action.yml

@@ -21,7 +21,6 @@ runs:
       env:
         AWS_WEB_IDENTITY_TOKEN_FILE: aws.web.identity.token.file
         AWS_DEFAULT_REGION: us-east-1
-
       shell: bash
       working-directory: ${{ inputs.repository }}
       run: |
@@ -34,7 +33,7 @@ runs:
         yum install -y jq
 
         export AWS_ROLE_ARN="arn:aws:iam::749337293305:role/gha_workflow_nightly_build_wheels"
-        if [[ ${{ env.CHANNEL == 'test' && startsWith(github.event.ref, 'refs/tags/v') }} ]]; then
+        if [[ "${CHANNEL}" == "test" ]]; then
           export AWS_ROLE_ARN="arn:aws:iam::749337293305:role/gha_workflow_test_build_wheels"
         fi
         echo "NIGHTLY_OR_TEST=1" >> "${GITHUB_ENV}"