fix env-vars action variables

Author: qno

.github/workflows/build-plugin.yml

@@ -101,8 +101,8 @@ jobs:
       - name: Check if plugin version matches tag
         run: |
           pluginversion=`jq -r '.version' plugin.json`
-          if [ "v$pluginversion" != "${{ CI_REF_NAME }}" ]; then
-            echo "Plugin version from plugin.json 'v$pluginversion' doesn't match with tag version '${{ CI_REF_NAME }}'"
+          if [ "v$pluginversion" != "${{ env.CI_REF_NAME }}" ]; then
+            echo "Plugin version from plugin.json 'v$pluginversion' doesn't match with tag version '${{ env.CI_REF_NAME }}'"
             exit 1
           fi
       - name: Create Release
@@ -113,7 +113,7 @@ jobs:
           tag_name: ${{ github.ref }}
           release_name: Release ${{ github.ref }}
           body: |
-            ${{ CI_REPOSITORY_NAME }} VCV Rack Plugin ${{ CI_REF_NAME }}
+            ${{ env.CI_REPOSITORY_NAME }} VCV Rack Plugin ${{ env.CI_REF_NAME }}
           draft: false
           prerelease: false
       - uses: actions/download-artifact@v2