use center aligment for table badges

Author: newpavlov

README.md

@@ -2,11 +2,11 @@
 
 Collection of key derivation functions (KDFs) written in pure Rust.
 
-## Crates
+## Supported algorithms
 
-| Algorithm | Name   | Crates.io     | Documentation | BMSRV |
-|-----------|--------|---------------|---------------|--------------|
-|  [HKDF]   | `hkdf` | [![crates.io](https://img.shields.io/crates/v/hkdf.svg)](https://crates.io/crates/hkdf) | [![Documentation](https://docs.rs/hkdf/badge.svg)](https://docs.rs/hkdf) | ![Minimum Supported Rust Version][msrv-1.41] |
+| Algorithm | Name   | Crates.io     | Documentation | MSRV |
+|-----------|--------|:-------------:|:-------------:|:----:|
+|  [HKDF]   | `hkdf` | [![crates.io](https://img.shields.io/crates/v/hkdf.svg)](https://crates.io/crates/hkdf) | [![Documentation](https://docs.rs/hkdf/badge.svg)](https://docs.rs/hkdf) | ![MSRV 1.41][msrv-1.41] |
 
 *NOTE: for password-based KDFs (e.g. Argon2, PBKDF2, scrypt), please see [RustCrypto/password-hashes]*