ci: use AZURE_DEVOPS_PAT secret for vsce publish (#120)

The release workflow referenced `secrets.VSCE_PAT`, but the repo only
has `AZURE_DEVOPS_PAT` configured. The name mismatch caused the env var
to expand to empty, which vsce reported as a PAT verification failure
(TF400813) in the v0.0.1 release run.

Author: diofeher

.github/workflows/release.yml

@@ -85,4 +85,4 @@ jobs:
       - name: Publish to Marketplace
         run: npx @vscode/vsce publish --packagePath $(find . -iname '*.vsix')
         env:
-          VSCE_PAT: ${{ secrets.VSCE_PAT }}
+          VSCE_PAT: ${{ secrets.AZURE_DEVOPS_PAT }}