fix(lsp): avoid ^M character in hover window on Windows (#19640)

runtime/lua/vim/lsp/util.lua

@@ -106,6 +106,7 @@ end
 
 ---@private
 local function split_lines(value)
+  value = string.gsub(value, '\r\n?', '\n')
   return split(value, '\n', true)
 end