Update activesupport requirement from ~> 5.2.7 to ~> 7.1.5

Updates the requirements on [activesupport](https://github.com/rails/rails) to permit the latest version.
- [Release notes](https://github.com/rails/rails/releases)
- [Changelog](https://github.com/rails/rails/blob/v8.0.2/activesupport/CHANGELOG.md)
- [Commits](rails/rails@v5.2.7...v7.1.5.1)

---
updated-dependencies:
- dependency-name: activesupport
  dependency-version: 7.1.5.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Gemfile

@@ -3,7 +3,7 @@ source "https://rubygems.org"
 # Specify your gem's dependencies in qiita-markdown.gemspec
 gemspec
 
-gem "activesupport", "~> 5.2.7"
+gem "activesupport", "~> 7.1.5"
 gem "bundler"
 gem "codeclimate-test-reporter", "0.4.4"
 gem "pry"