docs: info about the logo

Author: ldez

docs/src/docs/product/thanks.mdx

@@ -12,3 +12,5 @@ Thanks to developers and authors of used linters:
 
 Thanks to [alecthomas/gometalinter](https://github.com/alecthomas/gometalinter) for inspiration and amazing work.
 Thanks to [bradleyfalzon/revgrep](https://github.com/bradleyfalzon/revgrep) for cool diff tool.
+
+The golangci-lint logo is inspired by the Go gopher designed by Renee French [CC BY 3.0](https://creativecommons.org/licenses/by/3.0/).