Merge pull request #822 from matzew/polish_readme

Using a more recent version on the README instructions to fetch the dependency

README.md

@@ -27,7 +27,7 @@ _Note:_ Supported go version: 1.17+
 Add the module as dependency using go mod:
 
 ```shell
-go get github.com/cloudevents/sdk-go/v2@v2.6.0
+go get github.com/cloudevents/sdk-go/v2@v2.12.0
 ```
 
 And import the module in your code