Update anchor-lang requirement in /programs/whirlpool

Updates the requirements on [anchor-lang](https://github.com/coral-xyz/anchor) to permit the latest version.
- [Release notes](https://github.com/coral-xyz/anchor/releases)
- [Changelog](https://github.com/coral-xyz/anchor/blob/master/CHANGELOG.md)
- [Commits](coral-xyz/anchor@v0.29.0...v0.30.1)

---
updated-dependencies:
- dependency-name: anchor-lang
  dependency-type: direct:production
...

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

programs/whirlpool/Cargo.toml

@@ -14,7 +14,7 @@ default = []
 idl-build = ["anchor-lang/idl-build", "anchor-spl/idl-build"]
 
 [dependencies]
-anchor-lang = { version = "=0.29.0" }
+anchor-lang = { version = "=0.30.1" }
 anchor-spl = { version = "=0.29.0", features = ["metadata", "memo"] }
 spl-token = { version = "=4.0.1", features = ["no-entrypoint"] }
 spl-transfer-hook-interface = { version = "=0.5.0" }