Update hashbrown requirement from 0.11 to 0.12

Updates the requirements on [hashbrown](https://github.com/rust-lang/hashbrown) to permit the latest version.
- [Release notes](https://github.com/rust-lang/hashbrown/releases)
- [Changelog](https://github.com/rust-lang/hashbrown/blob/master/CHANGELOG.md)
- [Commits](rust-lang/hashbrown@v0.11.0...v0.12.0)

---
updated-dependencies:
- dependency-name: hashbrown
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

lightning-invoice/Cargo.toml

@@ -23,7 +23,7 @@ lightning = { version = "0.0.104", path = "../lightning", default-features = fal
 secp256k1 = { version = "0.20", default-features = false, features = ["recovery", "alloc"] }
 num-traits = { version = "0.2.8", default-features = false }
 bitcoin_hashes = { version = "0.10", default-features = false }
-hashbrown = { version = "0.11", optional = true }
+hashbrown = { version = "0.12", optional = true }
 core2 = { version = "0.3.0", default-features = false, optional = true }
 
 [dev-dependencies]

lightning/Cargo.toml

@@ -39,7 +39,7 @@ bitcoin = { version = "0.27", default-features = false, features = ["secp-recove
 # TODO remove this once rust-bitcoin PR #637 is released
 secp256k1 = { version = "0.20.2", default-features = false, features = ["alloc"] }
 
-hashbrown = { version = "0.11", optional = true }
+hashbrown = { version = "0.12", optional = true }
 hex = { version = "0.4", optional = true }
 regex = { version = "0.1.80", optional = true }
 backtrace = { version = "0.3", optional = true }