Update README.md

Author: adpi2

README.md

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 # Sbt Dependency Graph Action
 
-A Github action to submit the dependency graphs of an [sbt](https://www.scala-sbt.org/) build to the Github [Dependency submission API](https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/using-the-dependency-submission-api).
+A Github action to submit the dependency graph of an [sbt](https://www.scala-sbt.org/) build to the Github [Dependency submission API](https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/using-the-dependency-submission-api).
 
-After the workflow has been successfully run, the graph of the sbt build is visible in the [Dependency Graph](https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/exploring-the-dependencies-of-a-repository) page of the Insights tab.
+Before running the workflow, make sure that the `Dependency Graph` feature is enabled in the settings of your repository (`Settings` > `Code Security and Analysis`). 
+The graph of your sbt build will be visible in the [Dependency Graph](https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/exploring-the-dependencies-of-a-repository) page of the `Insights` tab.
 
 Enable [Dependabot](https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/about-supply-chain-security#what-is-dependabot) in your project settings to receive alerts for vulnerabilities that affect your sbt project.