Update rubocop-shopify requirement from ~> 2.9.0 to ~> 2.15.1

Updates the requirements on [rubocop-shopify](https://github.com/Shopify/ruby-style-guide) to permit the latest version.
- [Release notes](https://github.com/Shopify/ruby-style-guide/releases)
- [Commits](Shopify/ruby-style-guide@v2.9.0...v2.15.1)

---
updated-dependencies:
- dependency-name: rubocop-shopify
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Gemfile.lock

@@ -12,10 +12,10 @@ GEM
     byebug (11.1.3)
     diff-lcs (1.5.1)
     intel_hex (0.5.5)
-    json (2.7.2)
+    json (2.7.5)
     language_server-protocol (3.17.0.3)
     parallel (1.26.3)
-    parser (3.3.5.0)
+    parser (3.3.5.1)
       ast (~> 2.4.1)
       racc
     racc (1.8.1)
@@ -44,12 +44,12 @@ GEM
       rubocop-ast (>= 1.32.2, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.32.3)
+    rubocop-ast (1.33.0)
       parser (>= 3.3.1.0)
     rubocop-rspec (3.0.5)
       rubocop (~> 1.61)
-    rubocop-shopify (2.9.0)
-      rubocop (~> 1.33)
+    rubocop-shopify (2.15.1)
+      rubocop (~> 1.51)
     ruby-progressbar (1.13.0)
     sorbet (0.5.11577)
       sorbet-static (= 0.5.11577)
@@ -66,7 +66,7 @@ DEPENDENCIES
   rspec
   rubocop
   rubocop-rspec
-  rubocop-shopify (~> 2.9.0)
+  rubocop-shopify (~> 2.15.1)
   sorbet
 
 BUNDLED WITH

avruby.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency("rspec")
   s.add_development_dependency("rubocop")
   s.add_development_dependency("rubocop-rspec")
-  s.add_development_dependency("rubocop-shopify", "~> 2.9.0")
+  s.add_development_dependency("rubocop-shopify", "~> 2.15.1")
   s.add_development_dependency("sorbet")
 
   s.add_dependency("intel_hex", "~> 0.5.3")