update Rails to 8, update Gemfile.lock

Author: glasnt

run/rails/Gemfile

@@ -3,7 +3,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 gem "dotenv-rails", "~> 2.8"
 # Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
-gem "rails", "~> 7.0"
+gem "rails", "~> 8.0"
 # Use postgresql as the database for Active Record
 gem "pg", "~> 1.5"
 # Use Puma as the app server