Update CI badge to point to master branch (#343)
diff --git a/README.md b/README.md
index 2feaf45..ca81182 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[](https://github.com/google/webdriver.dart/actions/workflows/ci.yaml)
+[](https://github.com/google/webdriver.dart/actions/workflows/ci.yaml)
[](https://pub.dartlang.org/packages/webdriver)
[](https://pub.dev/packages/webdriver/publisher)