[Docs] Update

docs/parts/migration.tex

@@ -3,7 +3,9 @@
 \label{sec:migration}
 The updated helpers do not feature scopes anymore.
 You can continue using the old helpers, simply check out the \texttt{v1} branch, using \texttt{git checkout v1}.
-To switch back to the latest version, run \texttt{git checkout main}
+To switch back to the latest version, run \texttt{git checkout main}.
+
+Alternatively, you can change one line: The input line should point to \texttt{<repo>/old/janishutz-helpers-v1.tex}
 
 \begin{enumerate}
     \item Update the import path to \texttt{/path/to/helpers/janishutz-helpers.tex}