build: Bump syn from 2.0.68 to 2.0.70 in /fuzz

Bumps [syn](https://github.com/dtolnay/syn) from 2.0.68 to 2.0.70.
- [Release notes](https://github.com/dtolnay/syn/releases)
- [Commits](https://github.com/dtolnay/syn/compare/2.0.68...2.0.70)

---
updated-dependencies:
- dependency-name: syn
  dependency-type: indirect
  update-type: version-update:semver-patch
...

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

fuzz/Cargo.lock

@@ -295,6 +295,26 @@ dependencies = [
  "vmm-sys-util",
 ]
 
+[[package]]
+name = "enumflags2"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d232db7f5956f3f14313dc2f87985c58bd2c695ce124c8cdd984e08e15ac133d"
+dependencies = [
+ "enumflags2_derive",
+]
+
+[[package]]
+name = "enumflags2_derive"
+version = "0.7.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de0d48a183585823424a4ce1aa132d174a6a81bd540895822eb4c8373a8e49e8"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "epoll"
 version = "4.3.3"
@@ -466,6 +486,17 @@ dependencies = [
  "vmm-sys-util",
 ]
 
+[[package]]
+name = "landlock"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dafb8a4afee64f167eb2b52d32f0eea002e41a7a6450e68c799c8ec3a81a634c"
+dependencies = [
+ "enumflags2",
+ "libc",
+ "thiserror",
+]
+
 [[package]]
 name = "libc"
 version = "0.2.155"
@@ -771,9 +802,9 @@ checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
 
 [[package]]
 name = "syn"
-version = "2.0.68"
+version = "2.0.70"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "901fa70d88b9d6c98022e23b4136f9f3e54e4662c3bc1bd1d84a42a9a0f0c1e9"
+checksum = "2f0209b68b3613b093e0ec905354eccaedcfe83b8cb37cbdeae64026c3064c16"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1027,6 +1058,7 @@ dependencies = [
  "gdbstub",
  "gdbstub_arch",
  "hypervisor",
+ "landlock",
  "libc",
  "linux-loader",
  "log",