build(deps-dev): bump ruby-lsp from 0.26.8 to 0.26.9

Bumps [ruby-lsp](https://github.com/Shopify/ruby-lsp) from 0.26.8 to 0.26.9.
- [Release notes](https://github.com/Shopify/ruby-lsp/releases)
- [Commits](Shopify/ruby-lsp@v0.26.8...v0.26.9)

---
updated-dependencies:
- dependency-name: ruby-lsp
  dependency-version: 0.26.9
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -130,7 +130,7 @@ GEM
       rack (>= 1.1)
       rubocop (>= 1.75.0, < 2.0)
       rubocop-ast (>= 1.44.0, < 2.0)
-    ruby-lsp (0.26.8)
+    ruby-lsp (0.26.9)
       language_server-protocol (~> 3.17.0)
       prism (>= 1.2, < 2.0)
       rbs (>= 3, < 5)