Fix Pro gemspec paths after Phase 6 restructure

After Phase 6 moved the gemspec to the root, all dummy app Gemfiles
and CI workflows need to reference the correct paths.

Changes:
- Pro dummy Gemfiles: Change path from ../.. to ../../.. to reach repo root
- CI workflow cache keys: Fix gemspec path from react_on_rails_pro/react_on_rails_pro.gemspec to react_on_rails_pro.gemspec

Fixes pro-lint-js-and-ruby, build-dummy-app-webpack-test-bundles failures.

Author: justin808

.github/workflows/pro-integration-tests.yml

@@ -213,7 +213,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: react_on_rails_pro/vendor/bundle
-          key: v4-pro-package-gem-cache-${{ hashFiles('react_on_rails_pro/react_on_rails_pro.gemspec') }}
+          key: v4-pro-package-gem-cache-${{ hashFiles('react_on_rails_pro.gemspec') }}
 
       - name: Cache Pro package node modules
         uses: actions/cache@v4
@@ -412,7 +412,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: react_on_rails_pro/vendor/bundle
-          key: v4-pro-package-gem-cache-${{ hashFiles('react_on_rails_pro/react_on_rails_pro.gemspec') }}
+          key: v4-pro-package-gem-cache-${{ hashFiles('react_on_rails_pro.gemspec') }}
 
       - name: Cache Pro package node modules
         uses: actions/cache@v4

.github/workflows/pro-lint.yml

@@ -119,7 +119,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: react_on_rails_pro/vendor/bundle
-          key: v4-pro-package-gem-cache-${{ hashFiles('react_on_rails_pro/react_on_rails_pro.gemspec') }}
+          key: v4-pro-package-gem-cache-${{ hashFiles('react_on_rails_pro.gemspec') }}
 
       - name: Cache Pro dummy app node modules
         uses: actions/cache@v4

.github/workflows/pro-test-package-and-gem.yml

@@ -295,7 +295,7 @@ jobs:
         uses: actions/cache@v4
         with:
           path: react_on_rails_pro/vendor/bundle
-          key: v4-pro-package-gem-cache-ruby${{ matrix.ruby-version }}-${{ hashFiles('react_on_rails_pro/react_on_rails_pro.gemspec') }}
+          key: v4-pro-package-gem-cache-ruby${{ matrix.ruby-version }}-${{ hashFiles('react_on_rails_pro.gemspec') }}
 
       - name: Install Ruby Gems for Pro package
         run: |

react_on_rails_pro/spec/dummy/Gemfile

@@ -5,7 +5,7 @@ source "https://rubygems.org"
 ENV["SPEC_DUMMY"] = "yes"
 eval_gemfile File.expand_path("../../Gemfile.loader", __dir__)
 
-gem "react_on_rails_pro", path: "../.."
+gem "react_on_rails_pro", path: "../../.."
 
 gem "graphql"
 gem "prism-rails"

react_on_rails_pro/spec/execjs-compatible-dummy/Gemfile

@@ -64,4 +64,4 @@ end
 gem "shakapacker", "= 8.0"
 
 gem "react_on_rails", path: "../../.."
-gem "react_on_rails_pro", path: "../.."
+gem "react_on_rails_pro", path: "../../.."