chore(deps): update activerecord requirement from ~> 6.0 to ~> 8.0 (#1)

Automatic merge of Dependabot PR

Author: dependabot[bot]

instrumentation/que/example/Gemfile

@@ -6,7 +6,7 @@
 
 source 'https://rubygems.org'
 
-gem 'activerecord', '~> 6.0'
+gem 'activerecord', '~> 8.0'
 gem 'opentelemetry-api'
 gem 'opentelemetry-common'
 gem 'opentelemetry-instrumentation-que'