Update the CI badge

Author: cuviper

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on:
     branches: [ master ]
   merge_group:
 
-name: Continuous integration
+name: CI
 
 env:
   CARGO_TERM_COLOR: always

README.md

@@ -1,6 +1,6 @@
 # indexmap
 
-[![build status](https://github.com/indexmap-rs/indexmap/workflows/Continuous%20integration/badge.svg?branch=master)](https://github.com/indexmap-rs/indexmap/actions)
+[![build status](https://github.com/indexmap-rs/indexmap/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/indexmap-rs/indexmap/actions)
 [![crates.io](https://img.shields.io/crates/v/indexmap.svg)](https://crates.io/crates/indexmap)
 [![docs](https://docs.rs/indexmap/badge.svg)](https://docs.rs/indexmap)
 [![rustc](https://img.shields.io/badge/rust-1.63%2B-orange.svg)](https://img.shields.io/badge/rust-1.63%2B-orange.svg)