Fix env variable name

Author: mattiuusitalo

.github/workflows/release.yml

@@ -24,5 +24,5 @@ jobs:
     - name: Deploy to Clojars
       run: clojure -X:deploy
       env:
-        CLOJARS_USER: metosinci
+        CLOJARS_USERNAME: metosinci
         CLOJARS_PASSWORD: "${{ secrets.CLOJARS_DEPLOY_TOKEN }}"