docs: bump referenced library version to 1.5.1 (#519)

Author: 0xNeshi

CHANGELOG.md

@@ -8,6 +8,8 @@ The format follows [Keep a Changelog](https://keepachangelog.com/en/1.1.0/)
 
 ## Unreleased
 
+## 1.5.1 (22-07-2026)
+
 ### `openzeppelin_finance`
 
 #### Added

contracts/sale/README.md

@@ -26,7 +26,7 @@ payments deposited into it.
 
 ```toml
 [dependencies]
-openzeppelin_sale = { git = "https://github.com/OpenZeppelin/contracts-sui.git", subdir = "contracts/sale", rev = "v1.5.0" }
+openzeppelin_sale = { git = "https://github.com/OpenZeppelin/contracts-sui.git", subdir = "contracts/sale", rev = "v1.5.1" }
 ```
 
 > [!NOTE]