Update RuboCop (non-major) to v1.71.0 (mastodon#33644)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Gemfile.lock

@@ -370,7 +370,7 @@ GEM
       marcel (~> 1.0.1)
       mime-types
       terrapin (>= 0.6.0, < 2.0)
-    language_server-protocol (3.17.0.3)
+    language_server-protocol (3.17.0.4)
     launchy (3.0.1)
       addressable (~> 2.8)
       childprocess (~> 5.0)
@@ -716,7 +716,7 @@ GEM
       rspec-mocks (~> 3.0)
       sidekiq (>= 5, < 8)
     rspec-support (3.13.2)
-    rubocop (1.70.0)
+    rubocop (1.71.0)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
@@ -726,14 +726,14 @@ GEM
       rubocop-ast (>= 1.36.2, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 4.0)
-    rubocop-ast (1.37.0)
+    rubocop-ast (1.38.0)
       parser (>= 3.3.1.0)
     rubocop-capybara (2.21.0)
       rubocop (~> 1.41)
     rubocop-performance (1.23.1)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
-    rubocop-rails (2.28.0)
+    rubocop-rails (2.29.1)
       activesupport (>= 4.2.0)
       rack (>= 1.1)
       rubocop (>= 1.52.0, < 2.0)