Add lookback input to TagBot workflow

Added input parameter 'lookback' with default value.

Author: ViralBShah

.github/workflows/TagBot.yml

@@ -4,6 +4,9 @@ on:
     types:
       - created
   workflow_dispatch:
+    inputs:
+      lookback:
+        default: "3"
 jobs:
   TagBot:
     if: github.event_name == 'workflow_dispatch' || github.actor == 'JuliaTagBot'
@@ -12,4 +15,6 @@ jobs:
       - uses: JuliaRegistries/TagBot@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
+          # Edit the following line to reflect the actual name of the GitHub Secret containing your private key
           ssh: ${{ secrets.DOCUMENTER_KEY }}
+          # ssh: ${{ secrets.NAME_OF_MY_SSH_PRIVATE_KEY_SECRET }}