Bump version to v0.28 (#289)

Co-authored-by: mmtkgc-bot <mmtkgc.bot@gmail.com>

Author: qinsoon

CHANGELOG.md

@@ -1,3 +1,14 @@
+0.28.0 (2024-09-27)
+===
+
+## What's Changed
+* Require ObjectReference to point inside object by @wks in https://github.com/mmtk/mmtk-openjdk/pull/286
+* Bump the version of action/download-artifact by @wks in https://github.com/mmtk/mmtk-openjdk/pull/287
+* Bump version of action/upload-artifact by @qinsoon in https://github.com/mmtk/mmtk-openjdk/pull/288
+* Generational code cache roots by @wks in https://github.com/mmtk/mmtk-openjdk/pull/282
+
+**Full Changelog**: https://github.com/mmtk/mmtk-openjdk/compare/v0.27.0...v0.28.0
+
 0.27.0 (2024-08-09)
 ===
 

mmtk/Cargo.lock

@@ -1,6 +1,6 @@
 [package]
 name = "mmtk_openjdk"
-version = "0.27.0"
+version = "0.28.0"
 authors = [" <>"]
 rust-version = "1.73.0"
 build = "build.rs"
@@ -35,7 +35,7 @@ probe = "0.5"
 # - change branch
 # - change repo name
 # But other changes including adding/removing whitespaces in commented lines may break the CI.
-mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "a025c24104d8d456a865aa0122e6e0fb6d77e8f2" }
+mmtk = { git = "https://github.com/mmtk/mmtk-core.git", rev = "c4fdce02274a4b3fee49318cce9f6bf3eb378ae0" }
 # Uncomment the following to build locally
 # mmtk = { path = "../repos/mmtk-core" }