Remove threads from CI

Author: djukic14

.github/workflows/CI.yml

@@ -29,7 +29,6 @@ jobs:
           - ubuntu-latest
         threads:
           - '1'
-          - '5'
         arch:
           - x64
         include:

README.md

@@ -10,7 +10,7 @@
 [![Stable](https://img.shields.io/badge/docs-stable-blue.svg)](https://juliagraphs.org/GraphsColoring.jl/stable/)
 [![Dev](https://img.shields.io/badge/docs-dev-blue.svg)](https://juliagraphs.org/GraphsColoring.jl/dev/)
 [![Build Status](https://github.com/JuliaGraphs/GraphsColoring.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/JuliaGraphs/GraphsColoring.jl/actions/workflows/CI.yml?query=branch%3Amain)
-[![Coverage](https://codecov.io/gh/djukic14/GraphsColoring.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/djukic14/GraphsColoring.jl)
+[![Coverage](https://codecov.io/github/JuliaGraphs/GraphsColoring.jl/coverage.svg?branch=main)](https://codecov.io/github/JuliaGraphs/GraphsColoring.jl?branch=main)
 [![Aqua QA](https://raw.githubusercontent.com/JuliaTesting/Aqua.jl/master/badge.svg)](https://github.com/JuliaTesting/Aqua.jl)