feat(migration): add comment about new v:count support for diagnostic navigation

Author: mehalter

src/content/docs/configuration/v5_migration.mdx

@@ -231,6 +231,7 @@ Some changes have been made that do not necessarily require any user interventio
 - Neovim v0.11 adds a ton of great new features such as `vim.lsp.foldexpr` and context based comment strings. When using Neovim v0.11 we disable a few plugins and just rely on core features
   - `Comment.nvim` and `nvim-ts-context-commentstring` are disabled in Neovim v0.11 in favor of the built in commenting features
   - `nvim-ufo` is disabled in Neovim v0.11 in favor of the new AstroUI based fold expression. This provides a much clearer implementation of folding rather than relying on the "manual" fold method which can lead to some strange behavior.
+- With Neovim v0.11 diagnostic navigation bindings (`[d`/`]d`/`[w`/`]w`/`[e`/`]e`) support `v:count`, for example `3]e` will navigate 3 errors forward.
 - New mappings `gco` and `gcO` for inserting new comments below and above the current line
 - New mappings `<Leader>uv` and `<Leader>uV` for toggling diagnostic virtual text and virtual lines (virtual lines are only available in Neovim v0.11 and can replace plugins such as `lsp_lines.nvim`)
 - New mapping `gO` for document symbols to align with new core Neovim default LSP mappings