docs: match name in sentance

Author: zimeg

README.md

@@ -1,6 +1,6 @@
 # Slack GitHub Action
 
-> the GitHub Action for sending data to Slack and running commands
+> the Slack GitHub Action is for sending data to Slack and running commands
 
 [![codecov](https://codecov.io/gh/slackapi/slack-github-action/graph/badge.svg?token=OZNX7FHN78)](https://codecov.io/gh/slackapi/slack-github-action)
 

docs/slack-github-action.md

@@ -1,6 +1,6 @@
 # Slack GitHub Action
 
-The GitHub Action for sending data to Slack and running commands.
+The Slack GitHub Action is for sending data to Slack and running commands.
 
 ## Versioning
 
@@ -14,4 +14,4 @@ This project is licensed under the [MIT license](https://github.com/slackapi/sla
 
 ## Contributing
 
-All contributions are encouraged! Check out the [contributor's guide](https://github.com/slackapi/slack-github-action/blob/main/.github/contributing.md) to learn more.
+All contributions are encouraged! Check out the [contributor's guide](https://github.com/slackapi/slack-github-action/blob/main/.github/contributing.md) to learn more.