Fix yard doc syntax

Author: ahx

lib/openapi_first/schema/hash.rb

@@ -6,7 +6,7 @@ module OpenapiFirst
   module Schema
     # A hash of Schemas
     class Hash
-      # @param schema Hash of schemas
+      # @param schemas Hash of schemas
       # @param required Array of required keys
       def initialize(schemas, required: nil, **options)
         @schemas = schemas

lib/openapi_first/test.rb

@@ -87,7 +87,7 @@ def self.handle_exit
 
     # Print the coverage report
     # @param formatter A formatter to define the report.
-    # @output [IO] An output where to puts the report.
+    # @return [IO] An output where to puts the report.
     def self.report_coverage(formatter: Coverage::TerminalFormatter, **)
       puts formatter.new(**).format(Coverage.result)
     end

lib/openapi_first/test/observe.rb

@@ -6,7 +6,7 @@ module OpenapiFirst
   module Test
     class ObserveError < Error; end
 
-    # @visible private
+    # @visibility private
     module Observed; end
 
     # Inject silent request/response validation to observe rack apps during testing