Add spacing for ruby block `{`s (but not for hash `{`s) in `smartparens-ruby`

[gondalez]

Hi and thanks for the great package :) 🙏

I'm not sure if this is feasible but I figured I'd raise an issue to see what others think, or if there is a more elegant solution. I find myself having to manually space ruby blocks a lot and I'd rather let the computer do it.

Expected behavior

(_ is point)

Type let(:thing) {, get let(:thing) { _ }. Type my_hash = {, get my_hash = {_}

Actual behavior

Type let(:thing) {, get let(:thing) {_} (❌) Type my_hash = {, get my_hash = {_} (✔️)

Environment & version information

• smartparens version: 20230225.1026
• Active major-mode: ruby-mode
• Smartparens strict mode: t
• Emacs version (M-x emacs-version): GNU Emacs 28.2 (build 1, aarch64-apple-darwin22.3.0, Carbon Version 169 AppKit 2299.4) of 2023-02-07
• Starterkit/Distribution: Spacemacs
• OS: darwin