ci(github): fix mixed-inputs.yml

Author: remarkablemark

.github/workflows/mixed-inputs.yml

@@ -13,13 +13,14 @@ on:
         - cschleiden
       use-emoji:
         type: boolean
+        default: false
         description: Include 🎉🤣 emojis
 
 jobs:
   greet:
     runs-on: ubuntu-latest
     steps:
     - name: Send greeting
-      run: echo $MESSAGE ${{ toJSON(inputs.name) }} ${{ fromJSON('["", "🥳"]')[+inputs.use-emoji] }}
+      run: echo $MESSAGE ${{ toJSON(inputs.name) }} ${{ fromJSON('{"true":"🥳","false":""}')[inputs.use-emoji] }}
       env:
         MESSAGE: ${{ inputs.message }}