Update dependency letter_opener_web to v2

Gemfile

@@ -342,7 +342,7 @@ group :development do
   gem 'lefthook', '~> 0.7.0', require: false
   gem 'solargraph', '~> 0.43', require: false
 
-  gem 'letter_opener_web', '~> 1.4.1'
+  gem 'letter_opener_web', '~> 2.0.0'
 
   # Better errors handler
   gem 'better_errors', '~> 2.9.0'

Gemfile.lock

@@ -700,10 +700,11 @@ GEM
     lefthook (0.7.5)
     letter_opener (1.7.0)
       launchy (~> 2.2)
-    letter_opener_web (1.4.1)
-      actionmailer (>= 3.2)
-      letter_opener (~> 1.0)
-      railties (>= 3.2)
+    letter_opener_web (2.0.0)
+      actionmailer (>= 5.2)
+      letter_opener (~> 1.7)
+      railties (>= 5.2)
+      rexml
     libyajl2 (1.2.0)
     license_finder (6.0.0)
       bundler
@@ -1516,7 +1517,7 @@ DEPENDENCIES
   kramdown (~> 2.3.1)
   kubeclient (~> 4.9.2)
   lefthook (~> 0.7.0)
-  letter_opener_web (~> 1.4.1)
+  letter_opener_web (~> 2.0.0)
   license_finder (~> 6.0)
   licensee (~> 9.14.1)
   lockbox (~> 0.6.2)