README: organize the status badges into a table

Author: DilumAluthge

README.md

@@ -2,10 +2,12 @@
 
 [![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://chriselrod.github.io/BLASBenchmarksCPU.jl/stable)
 [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://chriselrod.github.io/BLASBenchmarksCPU.jl/dev)
-[![Continuous Integration](https://github.com/chriselrod/BLASBenchmarksCPU.jl/workflows/CI/badge.svg)](https://github.com/chriselrod/BLASBenchmarksCPU.jl/actions)
-[![Continuous Integration (Julia nightly)](https://github.com/chriselrod/BLASBenchmarksCPU.jl/workflows/CI%20(Julia%20nightly)/badge.svg)](https://github.com/chriselrod/BLASBenchmarksCPU.jl/actions?query=workflow%3A%22CI+%28Julia+nightly%29%22)
+
+| Julia   | CI |
+| ------- | -- |
+| v1      | [![Continuous Integration](https://github.com/chriselrod/BLASBenchmarksCPU.jl/workflows/CI/badge.svg)](https://github.com/chriselrod/BLASBenchmarksCPU.jl/actions) |
+| nightly | [![Continuous Integration (Julia nightly)](https://github.com/chriselrod/BLASBenchmarksCPU.jl/workflows/CI%20(Julia%20nightly)/badge.svg)](https://github.com/chriselrod/BLASBenchmarksCPU.jl/actions?query=workflow%3A%22CI+%28Julia+nightly%29%22) |
 
 BLASBenchmarksCPU is a Julia package for benchmarking BLAS libraries on CPUs.
 
-Please see the
-[documentation](https://chriselrod.github.io/BLASBenchmarksCPU.jl/stable).
+Please see the [documentation](https://chriselrod.github.io/BLASBenchmarksCPU.jl/stable).