Update README.md

Author: past-due

README.md

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 # NSIS FileCheck [![Build status](https://ci.appveyor.com/api/projects/status/4swfw5dvud34520r/branch/master?svg=true)](https://ci.appveyor.com/project/past-due/nsisfilecheck/branch/master) [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT) [![NSIS: 3.0+](https://img.shields.io/badge/NSIS-3.0%2B-orange.svg)](https://en.wikipedia.org/wiki/Nullsoft_Scriptable_Install_System)
 [NSIS (Nullsoft Scriptable Install System)](https://en.wikipedia.org/wiki/Nullsoft_Scriptable_Install_System) plugin that enables:
-- [Calculating a file's hash (SHA1, SHA2)](#calcFileHash)
-- [Verifying a file's Authenticode code signature (including details)](#verifyFileSignature)
-- [Obtaining a file's string version info](#getFileVersionInfoString)
+- [Calculating a file's hash (SHA1, SHA2)](#calcfilehash)
+- [Verifying a file's Authenticode code signature (including details)](#verifyfilesignature)
+- [Obtaining a file's string version info](#getfileversioninfostring)
 
 ### Supports:
 - **Windows**: Windows XP -> Windows 10