update TagBot.yml

Author: shravanngoswamii

.github/workflows/TagBot.yml

@@ -4,9 +4,6 @@ on:
     types:
       - created
   workflow_dispatch:
-    inputs:
-      lookback:
-        default: "3"
 jobs:
   TagBot:
     if: github.event_name == 'workflow_dispatch' || github.actor == 'JuliaTagBot'
@@ -17,5 +14,4 @@ jobs:
           token: ${{ secrets.GITHUB_TOKEN }}
           ssh: ${{ secrets.DOCUMENTER_KEY }}
           subdir: JuliaBUGS
-          lookback: ${{ github.event.inputs.lookback }}