fix: ignore exit code from FF addon publish

.github/workflows/publish.yml

@@ -31,10 +31,16 @@ jobs:
           name: connect-extension
           path: connect-extension.zip
       - name: Sign Production Firefox version
+        continue-on-error: true
         run: yarn web-ext sign --channel=listed
         env:
           WEB_EXT_API_KEY: ${{ secrets.WEB_EXT_API_KEY }}
           WEB_EXT_API_SECRET: ${{ secrets.WEB_EXT_API_SECRET }}
+      - uses: actions/upload-artifact@v2
+        name: Upload Firefox Add-On XPI
+        with:
+          name: connect-addon
+          path: web-ext-artifacts/*.xpi
 
   deploy-prod-apps:
     runs-on: ubuntu-latest
@@ -56,7 +62,6 @@ jobs:
           key: ${{ runner.os }}-${{ hashFiles('**/yarn.lock') }}
       - name: Install monorepo deps
         run: yarn --frozen-lockfile
-        if: steps.lerna-cache.outputs.cache-hit != 'true'
       - name: Build Blockstack App
         run: yarn prod:web
         working-directory: packages/app