fix docs.rake

Author: khiga8

lib/tasks/docs.rake

@@ -6,7 +6,7 @@ namespace :docs do
     require "erblint-github/linters"
     Dir[File.join("lib", "erblint-github", "linters", "github/**/*.rb")].sort.each do |file|
       rule_documentation_path = file
-                                .gsub("#{__dir__}linters/github/", "docs/rules/")
+                                .gsub("lib/erblint-github/linters/github/", "docs/rules/")
                                 .gsub(".rb", ".md")
                                 .tr("_", "-")
       raise "Missing rule documentation. Please document rule in #{rule_documentation_path}" unless File.file?(rule_documentation_path.to_s)