anchor in git workflow for resubmit step

commit 5509f43238433fa5e5431fe7d1d6f05a028ea65d
Author: Julie Zelenski <zelenski@users.noreply.github.com>
Date:   Thu Oct 3 18:42:08 2024 -0700

    anchor in git workflow for resubmit step

guides/cs107e-git.md

@@ -143,6 +143,8 @@ was successful by browsing your repo on GitHub and
 confirming that your newly created tag shows up in the __Tags__ section of the branches
 dropdown menu.
 
+<A name="resubmit"></a>
+#### Move tag for resubmit
 If you need to update your previously tagged submission with additional changes, you can move the tag to a different commit with the following command
 (note that you need to push `--force` when moving a tag that already exists).