Globally turn off MD013 lint

Might turn off markdownlint completely but this is the most annoying
rule.

lua/plugins/linting.lua

@@ -11,6 +11,12 @@ return {
       oxlint = {
         prepend_args = { "--type-aware" },
       },
+      ["markdownlint-cli2"] = {
+        prepend_args = {
+          "--config",
+          vim.fn.stdpath("config") .. "/.markdownlint-cli2.yaml",
+        },
+      },
     },
   },
 }