[rubygems/rubygems] Bump rb-sys

Bumps [rb-sys](https://github.com/oxidize-rb/rb-sys) from 0.9.61 to 0.9.64.
- [Release notes](https://github.com/oxidize-rb/rb-sys/releases)
- [Commits](https://github.com/oxidize-rb/rb-sys/compare/v0.9.61...v0.9.64)

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

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

test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.lock

@@ -144,18 +144,18 @@ dependencies = [
 
 [[package]]
 name = "rb-sys"
-version = "0.9.61"
+version = "0.9.64"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2825b89cd8ac35cc87cdafa5e7225043111e4f12990dfaf53a42b4a8a3f3e458"
+checksum = "cc8945662df8083245deda89e236647173cc7ad750f481ddcd7bbfd3afe3fa5e"
 dependencies = [
  "rb-sys-build",
 ]
 
 [[package]]
 name = "rb-sys-build"
-version = "0.9.61"
+version = "0.9.64"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f9b1bfcc3b289d4eb6ac5e45e83ae04a6a3bd9af14370c7048edf88d68dbb8dc"
+checksum = "ae8c3cdf9edc3908ee1555b7a1bca58ee1b499439b32cd1c1ec3e66736a8df48"
 dependencies = [
  "bindgen",
  "regex",

test/rubygems/test_gem_ext_cargo_builder/rust_ruby_example/Cargo.toml

@@ -7,4 +7,4 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-rb-sys = "0.9.61"
+rb-sys = "0.9.64"