Anomaly Detector Readme issues

[Melanie-Ma]

Section Link:

Suggestion:
a. Add hyperlink for Package (Maven) https://search.maven.org/search?q=azure-ai-anomalydetector
b. Add hyperlink for Samples https://github.com/Azure/azure-sdk-for-java/tree/master/sdk/anomalydetector/azure-ai-anomalydetector/src/samples
2.
Section Link:

Suggestion:
Add hyperlink for Java Development Kit(JDK) https://docs.microsoft.com/en-us/java/azure/jdk/?view=azure-java-stable
3.
Section Link:

Suggestion:
The font color should be black.

@jongio for notification.