Fix Sqlite newline syntax in workspace migration (#36916)

Fixes one more case where I incorrectly tried to use a `\n` escape
sequence for a newline in sqlite.

Release Notes:

- N/A

Author: maxbrunsfeld

crates/workspace/src/persistence.rs

@@ -553,7 +553,7 @@ impl Domain for WorkspaceDb {
                             WHEN workspaces.local_paths_array IS NULL OR workspaces.local_paths_array = "" THEN
                                 NULL
                             ELSE
-                                replace(workspaces.local_paths_array, ',', "\n")
+                                replace(workspaces.local_paths_array, ',', CHAR(10))
                         END
                 END as paths,