ci: do not destroy and remake tag when commit

.forgejo/workflows/mirror-repository.yml

@@ -57,12 +57,16 @@ jobs:
         run: |
           while read tag; do
             git checkout $tag
-            git tag -d $tag
+            if test ${{ inputs.is_commit }} != "true"; then
+              git tag -d $tag
+            fi
             git checkout ci -- ./.forgejo
             git config user.name "forgejo-actions[bot]"
             git config user.email "dev@ayakael.net"
             git commit -m 'Inject custom workflow'
-            git tag -a $tag -m $tag
+            if test ${{ inputs.is_commit }} != "true"; then
+              git tag -a $tag -m $tag
+            fi
           done < missing_tags
       - name: Push to destination
         run: git push --force origin refs/tags/*:refs/tags/* --tags