Auto-load lsp-racket

Fixes #3640

lsp-mode.el

@@ -179,7 +179,7 @@ As defined by the Language Server Protocol 3.16."
          lsp-gleam lsp-graphql lsp-hack lsp-grammarly lsp-groovy lsp-haskell lsp-haxe lsp-idris lsp-java lsp-javascript
          lsp-json lsp-kotlin lsp-latex lsp-ltex lsp-lua lsp-markdown lsp-marksman lsp-nginx lsp-nim lsp-nix lsp-magik
          lsp-metals lsp-mssql lsp-ocaml lsp-openscad lsp-pascal lsp-perl lsp-perlnavigator lsp-php lsp-pwsh lsp-pyls lsp-pylsp
-         lsp-pyright lsp-python-ms lsp-purescript lsp-r lsp-remark lsp-rf lsp-rust lsp-solargraph
+         lsp-pyright lsp-python-ms lsp-purescript lsp-r lsp-racket lsp-remark lsp-rf lsp-rust lsp-solargraph
          lsp-sorbet lsp-sourcekit lsp-sonarlint lsp-tailwindcss lsp-tex lsp-terraform lsp-toml
          lsp-ttcn3 lsp-typeprof lsp-v lsp-vala lsp-verilog lsp-vetur lsp-volar lsp-vhdl lsp-vimscript
          lsp-xml lsp-yaml lsp-sqls lsp-svelte lsp-steep lsp-zig)