[rubygems/rubygems] Bump rb-sys

Bumps [rb-sys](https://github.com/oxidize-rb/rb-sys) from 0.9.79 to 0.9.81.
- [Release notes](https://github.com/oxidize-rb/rb-sys/releases)
- [Commits](https://github.com/oxidize-rb/rb-sys/compare/v0.9.79...v0.9.81)

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

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

https://github.com/rubygems/rubygems/commit/d3237ab4e2

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

@@ -13,9 +13,9 @@ dependencies = [
 
 [[package]]
 name = "bindgen"
-version = "0.62.0"
+version = "0.66.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c6720a8b7b2d39dd533285ed438d458f65b31b5c257e6ac7bb3d7e82844dd722"
+checksum = "f2b84e06fc203107bfbad243f4aba2af864eb7db3b1cf46ea0a023b0b433d2a7"
 dependencies = [
  "bitflags",
  "cexpr",
@@ -33,9 +33,9 @@ dependencies = [
 
 [[package]]
 name = "bitflags"
-version = "1.3.2"
+version = "2.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+checksum = "630be753d4e58660abd17930c71b647fe46c27ea6b63cc59e1e3851406972e42"
 
 [[package]]
 name = "cexpr"
@@ -134,36 +134,36 @@ checksum = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.47"
+version = "1.0.66"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5ea3d908b0e36316caf9e9e2c4625cdde190a7e6f440d794667ed17a1855e725"
+checksum = "18fb31db3f9bddb2ea821cde30a9f70117e3f119938b5ee630b7403aa6e2ead9"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "quote"
-version = "1.0.21"
+version = "1.0.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+checksum = "50f3b39ccfb720540debaa0164757101c08ecb8d326b15358ce76a62c7e85965"
 dependencies = [
  "proc-macro2",
 ]
 
 [[package]]
 name = "rb-sys"
-version = "0.9.79"
+version = "0.9.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "939fb78db3e4f26665c1d4c7b91ca66d3578335a19aba552d4a6445811d07072"
+checksum = "a57240b308b155b09dce81e32829966a99f52d1088b45957e4283e526c5317a1"
 dependencies = [
  "rb-sys-build",
 ]
 
 [[package]]
 name = "rb-sys-build"
-version = "0.9.79"
+version = "0.9.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "335a95eb0420d52fa94ef12019df3c2c250c6b19cbb3c60bd05cb7e9c362072c"
+checksum = "f24ce877a4c5d07f06f6aa6fec3ac95e4b357b9f73b0f5445d8cbb7266d410e8"
 dependencies = [
  "bindgen",
  "lazy_static",
@@ -211,9 +211,9 @@ checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"
 
 [[package]]
 name = "syn"
-version = "1.0.109"
+version = "2.0.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b64191b275b66ffe2469e8af2c1cfe3bafa67b529ead792a6d0160888b4237"
+checksum = "04361975b3f5e348b2189d8dc55bc942f278b2d482a6a0365de5bdd62d351567"
 dependencies = [
  "proc-macro2",
  "quote",

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

@@ -7,4 +7,4 @@ edition = "2021"
 crate-type = ["cdylib"]
 
 [dependencies]
-rb-sys = "0.9.79"
+rb-sys = "0.9.81"