Downgrade autoprefixer-rails gem

We need update Node version before upgrade this gem version.

Gemfile

@@ -6,7 +6,7 @@ gem "acts-as-taggable-on", "~> 5.0.0"
 gem "acts_as_votable", "~> 0.11.1"
 gem "ahoy_matey", "~> 1.6.0"
 gem "ancestry", "~> 3.0.2"
-gem "autoprefixer-rails", "~> 9.1.4"
+gem "autoprefixer-rails", "~> 8.2.0"
 gem "best_in_place", "~> 3.0.1"
 gem "browser", "~> 2.5.3"
 gem "cancancan", "~> 2.3.0"

Gemfile.lock

@@ -72,7 +72,7 @@ GEM
       activerecord (>= 3.2.0)
     arel (7.1.4)
     ast (2.4.0)
-    autoprefixer-rails (9.1.4)
+    autoprefixer-rails (8.2.0)
       execjs
     babel-source (5.8.35)
     babel-transpiler (0.7.0)
@@ -534,7 +534,7 @@ DEPENDENCIES
   acts_as_votable (~> 0.11.1)
   ahoy_matey (~> 1.6.0)
   ancestry (~> 3.0.2)
-  autoprefixer-rails (~> 9.1.4)
+  autoprefixer-rails (~> 8.2.0)
   best_in_place (~> 3.0.1)
   browser (~> 2.5.3)
   bullet (~> 5.7.0)