Bump rspec-rails dependency; backports #3324

Author: cbeer

blacklight.gemspec

@@ -35,7 +35,7 @@ Gem::Specification.new do |s|
   s.add_dependency "zeitwerk"
 
   s.add_development_dependency "rsolr", ">= 1.0.6", "< 3"  # Library for interacting with rSolr.
-  s.add_development_dependency "rspec-rails", "~> 6.1"
+  s.add_development_dependency "rspec-rails", ">= 6.1", "< 8"
   s.add_development_dependency "rspec-collection_matchers", ">= 1.0"
   s.add_development_dependency 'axe-core-rspec'
   s.add_development_dependency "capybara", '~> 3'