Update release action

- Drop pull secret now that acorn is public
- Use better convention for username

Signed-off-by: Craig Jellick <[email protected]>

Author: cjellick

.github/workflows/release.yaml

@@ -11,12 +11,10 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: acorn-io/actions-setup@v1
-        with:
-          token: ${{ secrets.PULL_TOKEN }}
       - uses: acorn-io/actions-login@v1
         with:
           registry: ghcr.io
-          username: foobar
+          username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Set tag
         run: echo "TAG=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV