feat: update Git Attributes

This ensures that the `tests` directory is ignored.

Author: owenvoke

.gitattributes

@@ -1,6 +1,6 @@
 /.dependabot/ export-ignore
 /.github/ export-ignore
-/test/ export-ignore
+/tests/ export-ignore
 /.codecov.yml export-ignore
 /.editorconfig export-ignore
 /.gitattributes export-ignore