Change default lookback value to 7

Author: briochemc

.github/workflows/TagBot.yml

@@ -6,7 +6,7 @@ on:
   workflow_dispatch:
     inputs:
       lookback:
-        default: "3"
+        default: "7"
 jobs:
   TagBot:
     if: github.event_name == 'workflow_dispatch' || github.actor == 'JuliaTagBot'
@@ -16,4 +16,3 @@ jobs:
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
           ssh: ${{ secrets.DOCUMENTER_KEY }}
-          lookback: 14