fix(ci): keep snap canary action on workflow revision

Signed-off-by: Evan Lezar <elezar@nvidia.com>

Author: elezar

.github/workflows/release-canary.yml

@@ -165,7 +165,7 @@ jobs:
     steps:
       - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
         with:
-          ref: ${{ github.event.workflow_run.head_sha || github.sha }}
+          ref: ${{ github.sha }}
           fetch-depth: 1
 
       - name: Download snap from release-dev artifacts

CONTRIBUTING.md

@@ -517,4 +517,4 @@ DCO sign-off is separate from cryptographic commit signing. CI requires signing
 
 ## CI
 
-How PR CI runs, the `test:e2e`, `test:e2e-gpu`, and `test:e2e-kubernetes` labels, copy-pr-bot, and commit-signing setup are documented in [CI.md](CI.md).
+How PR CI runs, the `test:e2e`, `test:e2e-gpu`, `test:e2e-kubernetes`, and `test:snap` labels, copy-pr-bot, and commit-signing setup are documented in [CI.md](CI.md).