fix: Source archive upload (#121)

Fix incorrect call to web-ext. They changed the api in version 8 and I
was reading about version 7.

Author: spalmurray

.github/workflows/publish.yml

@@ -45,8 +45,9 @@ jobs:
           REFRESH_TOKEN: ${{ secrets.GOOGLE_WEB_STORE_REFRESH_TOKEN }}
       - name: Publish to Firefox
         working-directory: dist-firefox
-        run: npx web-ext sign --use-submission-api --channel listed
+        run: npx web-ext sign
         env:
           WEB_EXT_API_KEY: ${{ secrets.WEB_EXT_JWT_ISSUER }}
           WEB_EXT_API_SECRET: ${{ secrets.WEB_EXT_JWT_SECRET }}
+          WEB_EXT_CHANNEL: listed
           WEB_EXT_API_UPLOAD_SOURCE_CODE: codecov-browser-extension.tar.gz