Update erb_lint requirement from ~> 0.5.0 to ~> 0.9.0

Updates the requirements on [erb_lint](https://github.com/Shopify/erb-lint) to permit the latest version.
- [Release notes](https://github.com/Shopify/erb-lint/releases)
- [Commits](Shopify/erb_lint@v0.5.0...v0.9.0)

---
updated-dependencies:
- dependency-name: erb_lint
  dependency-version: 0.9.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

publify_core.gemspec

@@ -51,7 +51,7 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency "appraisal", "~> 2.3"
   s.add_development_dependency "capybara", "~> 3.0"
-  s.add_development_dependency "erb_lint", "~> 0.5.0"
+  s.add_development_dependency "erb_lint", "~> 0.9.0"
   s.add_development_dependency "factory_bot", "~> 6.2"
   s.add_development_dependency "feedjira", "~> 3.2"
   s.add_development_dependency "i18n-tasks", "~> 1.0.12"