[release] change tag to main

Author: MarcelKoch

CMakeLists.txt

@@ -7,7 +7,7 @@ project(
     DESCRIPTION
         "A numerical linear algebra library targeting many-core architectures"
 )
-set(Ginkgo_VERSION_TAG "develop")
+set(Ginkgo_VERSION_TAG "main")
 set(PROJECT_VERSION_TAG ${Ginkgo_VERSION_TAG})
 if(Ginkgo_VERSION_TAG STREQUAL "master")
     set(GINKGO_VERSION_TAG_DEPRECATED ON)

README.md

@@ -2,7 +2,7 @@
 
 <div align="center">
 
-[![License](https://img.shields.io/github/license/ginkgo-project/ginkgo.svg)](./LICENSE)|[![c++ standard](https://img.shields.io/badge/c%2B%2B-17-blue.svg)](https://en.wikipedia.org/wiki/C%2B%2B#Standardization)|[![Documentation](https://img.shields.io/badge/Documentation-latest-blue.svg)](https://ginkgo-project.github.io/ginkgo-generated-documentation/doc/develop/)|[![DOI](https://joss.theoj.org/papers/10.21105/joss.02260/status.svg)](https://doi.org/10.21105/joss.02260)|[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/8037/badge)](https://www.bestpractices.dev/projects/8037)
+[![License](https://img.shields.io/github/license/ginkgo-project/ginkgo.svg)](./LICENSE)|[![c++ standard](https://img.shields.io/badge/c%2B%2B-17-blue.svg)](https://en.wikipedia.org/wiki/C%2B%2B#Standardization)|[![Documentation](https://img.shields.io/badge/Documentation-latest-blue.svg)](https://ginkgo-project.github.io/ginkgo-generated-documentation/doc/main/)|[![DOI](https://joss.theoj.org/papers/10.21105/joss.02260/status.svg)](https://doi.org/10.21105/joss.02260)|[![OpenSSF Best Practices](https://www.bestpractices.dev/projects/8037/badge)](https://www.bestpractices.dev/projects/8037)
 |:-:|:-:|:-:|:-:|:-:|