chore: pin mitchellh/vouch actions to SHA (#377)

Signed-off-by: John Myers <[email protected]>
Co-authored-by: John Myers <[email protected]>

Author: johntmyers

.github/workflows/vouch-check.yml

@@ -13,7 +13,7 @@ jobs:
     if: github.repository_owner == 'NVIDIA'
     runs-on: ubuntu-latest
     steps:
-      - uses: mitchellh/vouch/action/check-pr@v1
+      - uses: mitchellh/vouch/action/check-pr@f44860978966ace98fb11aaaa20f2b27d7543e13 # v1
         with:
           pr-number: ${{ github.event.pull_request.number }}
           auto-close: true

.github/workflows/vouch-command.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
-      - uses: mitchellh/vouch/action/manage-by-discussion@v1
+      - uses: mitchellh/vouch/action/manage-by-discussion@f44860978966ace98fb11aaaa20f2b27d7543e13 # v1
         with:
           discussion-number: ${{ github.event.discussion.number }}
           comment-node-id: ${{ github.event.comment.node_id }}