Merge branch 'main' of github.com:nao1215/gup

Author: nao1215

README.md

@@ -123,8 +123,9 @@ gup:INFO : create zsh-completion file: /home/nao/.zsh/completion/_gup
 ```
 
 # Contributing
-First off, thanks for taking the time to contribute! ❤️
-See [CONTRIBUTING.md](./CONTRIBUTING.md) for more information.  
+First off, thanks for taking the time to contribute! ❤️  See [CONTRIBUTING.md](./CONTRIBUTING.md) for more information.
+Contributions are not only related to development. For example, GitHub Star motivates me to develop!
+[![Star History Chart](https://api.star-history.com/svg?repos=nao1215/gup&type=Date)](https://star-history.com/#nao1215/gup&Date)
 
 # Contact
 If you would like to send comments such as "find a bug" or "request for additional features" to the developer, please use one of the following contacts.
@@ -133,3 +134,4 @@ If you would like to send comments such as "find a bug" or "request for addition
 
 # LICENSE
 The gup project is licensed under the terms of [the Apache License 2.0](./LICENSE).
+