Update README.md

Author: etpinard

test/image/README.md

@@ -40,8 +40,8 @@ as listed on [hub.docker.com](https://hub.docker.com/r/plotly/testbed/tags/) and
 
 ### Step 2: Run the image tests
 
-The image testing docker container allows plotly.js developers to ([A](#a-run-image-comparison-tests) run image
-comparison tests, ([B](#b-run-image-export-tests) run image export tests and ([C](#c-generate-or-update-existing-baseline-image)) generate baseline
+The image testing docker container allows plotly.js developers to ([A](#a-run-image-comparison-tests)) run image
+comparison tests, ([B](#b-run-image-export-tests)) run image export tests and ([C](#c-generate-or-update-existing-baseline-image)) generate baseline
 images.
 
 **IMPORTANT:** the image tests scripts do **not** bundle the source files before