config: update activesupport dependency pinning

Signed-off-by: Sonu Saha <sonu.saha@progress.com>

chef-zero.gemspec

@@ -13,7 +13,10 @@ Gem::Specification.new do |s|
 
   s.required_ruby_version = ">= 3.0"
 
-  s.add_dependency "activesupport","~> 6.1"  #pin until we support ruby 2.6
+  # Note: 7.1.0 does not defaults its cache_format_version to 7.1 but 6.1 instead which gives deprecation warnings
+  # Remove the version constraint when we can upgrade to 7.1.1 post stable release of Activesupport 7.1
+  # Similar issue with 7.0 existed: https://github.com/rails/rails/pull/45293
+  s.add_dependency "activesupport", "~> 7.0", "< 7.1"
   s.add_dependency "mixlib-log", ">= 2.0", "< 4.0"
   s.add_dependency "hashie", ">= 2.0", "< 5.0"
   s.add_dependency "uuidtools", "~> 2.1"