[rubygems/rubygems] Bump rb-sys

Bumps [rb-sys](https://github.com/oxidize-rb/rb-sys) from 0.9.89 to 0.9.90.
- [Release notes](https://github.com/oxidize-rb/rb-sys/releases)
- [Commits](oxidize-rb/rb-sys@v0.9.89...v0.9.90)

---
updated-dependencies:
- dependency-name: rb-sys
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

rubygems/rubygems@ce663279b9

Author: dependabot[bot]

test/rubygems/test_gem_ext_cargo_builder/custom_name/ext/custom_name_lib/Cargo.lock

@@ -7,4 +7,4 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-rb-sys = "0.9.89"
+rb-sys = "0.9.90"