Bump simple_form from 5.0.2 to 5.0.3 (#14923)

Bumps [simple_form](https://github.com/plataformatec/simple_form) from 5.0.2 to 5.0.3.
- [Release notes](https://github.com/plataformatec/simple_form/releases)
- [Changelog](https://github.com/heartcombo/simple_form/blob/master/CHANGELOG.md)
- [Commits](https://github.com/plataformatec/simple_form/compare/v5.0.2...v5.0.3)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Gemfile.lock

@@ -581,7 +581,7 @@ GEM
       thor (>= 0.20, < 2.0)
     simple-navigation (4.1.0)
       activesupport (>= 2.3.2)
-    simple_form (5.0.2)
+    simple_form (5.0.3)
       actionpack (>= 5.0)
       activemodel (>= 5.0)
     simplecov (0.19.0)