Fix typo

Author: Watson1978

lib/fluent/plugin/filter_obsolete_plugins.rb

@@ -46,7 +46,7 @@ def configure(conf)
       rescue Fluent::ConfigError
         raise
       rescue => e
-        log.info("Failed to notfify obsolete plugins", error: e)
+        log.info("Failed to notify obsolete plugins", error: e)
       end
 
       def filter(tag, time, record)

test/plugin/test_filter_obsolete_plugins.rb

@@ -120,7 +120,7 @@ class ObsoletePluginsFilterTest < Test::Unit::TestCase
       d = create_driver("plugins_json #{fixture_path('invalid.json')}")
 
       expected_logs = [
-        "#{@time} [info]: Failed to notfify obsolete plugins error_class=JSON::ParserError error=\"expected ',' or '}' after object value, got: EOF at line 11 column 1\"\n",
+        "#{@time} [info]: Failed to notify obsolete plugins error_class=JSON::ParserError error=\"expected ',' or '}' after object value, got: EOF at line 11 column 1\"\n",
       ]
 
       assert_equal(expected_logs, d.logs)
@@ -139,7 +139,7 @@ class ObsoletePluginsFilterTest < Test::Unit::TestCase
       sleep 2
 
       expected_logs = [
-        "#{@time} [info]: Failed to notfify obsolete plugins error_class=Timeout::Error error=\"execution expired\"\n",
+        "#{@time} [info]: Failed to notify obsolete plugins error_class=Timeout::Error error=\"execution expired\"\n",
       ]
 
       assert_equal(expected_logs, d.logs)