Revert unintentional addon name change (#75)

Author: st0012

lib/ruby_lsp/ruby_lsp_rspec/addon.rb

@@ -46,7 +46,7 @@ def deactivate; end
       # @override
       #: -> String
       def name
-        "ruby-lsp-rspec"
+        "Ruby LSP RSpec"
       end
 
       # @override