build(deps-dev): update rubocop requirement from = 1.77.0 to = 1.78.0

Updates the requirements on [rubocop](https://github.com/rubocop/rubocop) to permit the latest version.

Updates `rubocop` from 1.77.0 to 1.78.0
- [Release notes](https://github.com/rubocop/rubocop/releases)
- [Changelog](https://github.com/rubocop/rubocop/blob/master/CHANGELOG.md)
- [Commits](rubocop/rubocop@v1.77.0...v1.78.0)

---
updated-dependencies:
- dependency-name: rubocop
  dependency-version: 1.78.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: all-dependencies
...

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

Author: dependabot[bot]

Gemfile.lock

@@ -83,7 +83,7 @@ GEM
     rainbow (3.1.1)
     rake (13.3.0)
     regexp_parser (2.10.0)
-    rubocop (1.77.0)
+    rubocop (1.78.0)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
@@ -130,7 +130,7 @@ DEPENDENCIES
   minitest (~> 5.25.1)
   mocha (~> 2.7.0)
   rake (~> 13.3.0)
-  rubocop (= 1.77.0)
+  rubocop (= 1.78.0)
   rubocop-github (~> 0.23.0)
 
 BUNDLED WITH

erblint-github.gemspec

@@ -21,7 +21,7 @@ Gem::Specification.new do |s|
   s.add_development_dependency "mocha", "~> 2.7.0"
   s.add_development_dependency "rake", "~> 13.3.0"
 
-  s.add_development_dependency "rubocop", "= 1.77.0"
+  s.add_development_dependency "rubocop", "= 1.78.0"
   s.add_development_dependency "rubocop-github", "~> 0.23.0"
   s.metadata["rubygems_mfa_required"] = "true"