Add Pre-Commit Badges to README.md

This commit adds the result from https://results.pre-commit.ci/repo/github/220674143.

README.md

@@ -1,4 +1,4 @@
-[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](http://www.gnu.org/licenses/gpl-3.0)   [![CMake on multiple platforms](https://github.com/franziska-wegner/egoa/actions/workflows/cmake-multi-platform.yml/badge.svg?branch=master)](https://github.com/franziska-wegner/egoa/actions/workflows/cmake-multi-platform.yml)   [![CodeQL](https://github.com/franziska-wegner/egoa/actions/workflows/codeql.yml/badge.svg?branch=master)](https://github.com/franziska-wegner/egoa/actions/workflows/codeql.yml) <a href="https://scan.coverity.com/projects/franziska-wegner-egoa"><img alt="Coverity Scan Build Status" src="https://scan.coverity.com/projects/29511/badge.svg"/></a>   [![codecov](https://codecov.io/gh/franziska-wegner/egoa/graph/badge.svg?token=OL0N2WXV4I)](https://codecov.io/gh/franziska-wegner/egoa)   [![cpp-linter](https://github.com/franziska-wegner/egoa/actions/workflows/cpp-linter.yml/badge.svg)](https://github.com/franziska-wegner/egoa/actions/workflows/cpp-linter.yml)
+[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](http://www.gnu.org/licenses/gpl-3.0)   [![CMake on multiple platforms](https://github.com/franziska-wegner/egoa/actions/workflows/cmake-multi-platform.yml/badge.svg?branch=master)](https://github.com/franziska-wegner/egoa/actions/workflows/cmake-multi-platform.yml)   [![CodeQL](https://github.com/franziska-wegner/egoa/actions/workflows/codeql.yml/badge.svg?branch=master)](https://github.com/franziska-wegner/egoa/actions/workflows/codeql.yml) <a href="https://scan.coverity.com/projects/franziska-wegner-egoa"><img alt="Coverity Scan Build Status" src="https://scan.coverity.com/projects/29511/badge.svg"/></a>   [![codecov](https://codecov.io/gh/franziska-wegner/egoa/graph/badge.svg?token=OL0N2WXV4I)](https://codecov.io/gh/franziska-wegner/egoa)   [![cpp-linter](https://github.com/franziska-wegner/egoa/actions/workflows/cpp-linter.yml/badge.svg)](https://github.com/franziska-wegner/egoa/actions/workflows/cpp-linter.yml) [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/franziska-wegner/egoa/main.svg)](https://results.pre-commit.ci/latest/github/franziska-wegner/egoa/main)
 
 
 <h1 align="center">EGOA - Energy Grid Optimization and Analysis</h1>
@@ -18,6 +18,7 @@ Energy Grid Optimization and Analysis (EGOA) is a framework for energy grid anal
 | Coverity Scan Build Status: | <a href="https://scan.coverity.com/projects/franziska-wegner-egoa"><img alt="Coverity Scan Build Status" src="https://scan.coverity.com/projects/29511/badge.svg"/></a> |
 | Code Coverage: | [![codecov](https://codecov.io/gh/franziska-wegner/egoa/graph/badge.svg?token=OL0N2WXV4I)](https://codecov.io/gh/franziska-wegner/egoa) |
 | C/C++ Linter: | [![cpp-linter](https://github.com/franziska-wegner/egoa/actions/workflows/cpp-linter.yml/badge.svg)](https://github.com/franziska-wegner/egoa/actions/workflows/cpp-linter.yml) |
+| Pre-Commit Checks | [![pre-commit.ci status](https://results.pre-commit.ci/badge/github/franziska-wegner/egoa/main.svg)](https://results.pre-commit.ci/latest/github/franziska-wegner/egoa/main) |
 
 
 <h2>Benchmark Data Sets</h2>