"File Not Found" displays for "achecker.js" noted in cypress-accessibility-checker README.md

[jmosley5]

Describe the bug
As a new user reading the cypress-accessibility-checker README.md, all links should redirect to the correct page where linked. In the "Usage" section, clicking located here in the following statement directs the user to a 404 not found page.

Examples of how to use each of the APIs below can be found in the achecker.js test file [located here](https://github.com/IBMa/equal-access/blob/master/cypress-accessibility-checker/test/cypress/integration/achecker.js).

To Reproduce
Steps to reproduce the behavior:

1. Go to the "Usage" section for the cypress-accessibility-checker
2. Click on "located here" in the sentence "Examples of how to use each of the APIs below can be found in the achecker.js test file [located here]"
3. The user is redirected to a 404 not found page
4. Link

Expected behavior
The user should be directed to the correct usage page.

Screenshots

Desktop (please complete the following information):

• OS: Any
• Browser: Any
• Version Any

Smartphone (please complete the following information):
N/A

Additional context
None at this time.

Definition of Done

• Design artifacts reviewed
• Work item implemented
• Automated test case created (when applicable)
• Unit test completed
• Run Checker (when applicable)
• Manual and Screen Reader Testing (when applicable)
• Video recording of user experience walkthrough (if impact to UX)
• PR created