use center aligment for table badges

Author: newpavlov

README.md

@@ -2,14 +2,14 @@
 
 Collection of [Message Authentication Code][1] (MAC) algorithms written in pure Rust.
 
-## Crates
+## Supported algorithms
 
 | Algorithm | Crate  | Crates.io     | Documentation | MSRV |
-|-----------|--------|---------------|---------------|------|
-| [CMAC]    | `cmac` | [![crates.io](https://img.shields.io/crates/v/cmac.svg)](https://crates.io/crates/cmac) | [![Documentation](https://docs.rs/cmac/badge.svg)](https://docs.rs/cmac) | ![Minimum Supported Rust Version][msrv-1.41] |
-| [DAA]     | `daa`  | [![crates.io](https://img.shields.io/crates/v/daa.svg)](https://crates.io/crates/daa) | [![Documentation](https://docs.rs/daa/badge.svg)](https://docs.rs/daa) | ![Minimum Supported Rust Version][msrv-1.41] |
-| [HMAC]    | `hmac` | [![crates.io](https://img.shields.io/crates/v/hmac.svg)](https://crates.io/crates/hmac) | [![Documentation](https://docs.rs/hmac/badge.svg)](https://docs.rs/hmac) | ![Minimum Supported Rust Version][msrv-1.41] |
-| [PMAC]    | `pmac` | [![crates.io](https://img.shields.io/crates/v/pmac.svg)](https://crates.io/crates/pmac) | [![Documentation](https://docs.rs/pmac/badge.svg)](https://docs.rs/pmac) | ![Minimum Supported Rust Version][msrv-1.41] |
+|-----------|--------|:-------------:|:-------------:|:----:|
+| [CMAC]    | `cmac` | [![crates.io](https://img.shields.io/crates/v/cmac.svg)](https://crates.io/crates/cmac) | [![Documentation](https://docs.rs/cmac/badge.svg)](https://docs.rs/cmac) | ![MSRV 1.41][msrv-1.41] |
+| [DAA]     | `daa`  | [![crates.io](https://img.shields.io/crates/v/daa.svg)](https://crates.io/crates/daa) | [![Documentation](https://docs.rs/daa/badge.svg)](https://docs.rs/daa) | ![MSRV 1.41][msrv-1.41] |
+| [HMAC]    | `hmac` | [![crates.io](https://img.shields.io/crates/v/hmac.svg)](https://crates.io/crates/hmac) | [![Documentation](https://docs.rs/hmac/badge.svg)](https://docs.rs/hmac) | ![MSRV 1.41][msrv-1.41] |
+| [PMAC]    | `pmac` | [![crates.io](https://img.shields.io/crates/v/pmac.svg)](https://crates.io/crates/pmac) | [![Documentation](https://docs.rs/pmac/badge.svg)](https://docs.rs/pmac) | ![MSRV 1.41][msrv-1.41] |
 
 ### Minimum Supported Rust Version (MSRV) Policy