make the RubyLSP indexing enhancement more stable (#965)

Author: joeldrapper

lib/ruby_lsp/phlex/addon.rb

@@ -41,6 +41,8 @@ def on_call_node_enter(node)
 							RubyIndexer::Entry::BlockParameter.new(name: :content),
 						]),
 					], visibility: :public, comments: "Outputs a `<#{tag_name}>` tag.")
+				else
+					# no-op
 				end
 			end
 		end