zenodo DOI added

README.md

@@ -2,10 +2,11 @@
 [![CI](https://github.com/milankl/BitInformation.jl/actions/workflows/CI.yml/badge.svg)](https://github.com/milankl/BitInformation.jl/actions/workflows/CI.yml)
 [![](https://img.shields.io/badge/docs-stable-blue.svg)](https://milankl.github.io/BitInformation.jl/stable)
 [![](https://img.shields.io/badge/docs-dev-blue.svg)](https://milankl.github.io/BitInformation.jl/dev)
+[![DOI](https://zenodo.org/badge/DOI/10.5281/zenodo.4774191.svg)](https://doi.org/10.5281/zenodo.4774191)
 
 BitInformation.jl is a package for the analysis of bitwise information in Julia Arrays.
 Based on counting the occurrences of bits in floats (or generally any bittype) across various
-dimensions of an array, this package provides functions to calcualte quantities like the 
+dimensions of an array, this package provides functions to calculate quantities like the 
 bitwise real information content, the mutual information, the redundancy or preserved information
 between arrays.