fix: nvim 0.11 overrides float border with default option if not set (#447)

We have to set border style to "none" to keep old behaviour of line_hover

Author: BrotifyPacha

lua/dapui/render/line_hover.lua

@@ -87,6 +87,7 @@ function M.show()
     width = content_width,
     height = 1,
     style = "minimal",
+    border = "none",
     row = 0,
     col = 0,
   }