Fix a typo in README.md

[shshsh-sh]

Summary

This PR fixes a typo in the README.md documentation. The phrase "a accessor" has been corrected to "an accessor" to follow proper English grammar rules.

Location: In the "Explain this!" section that explains the counter example in the "At a Glance" section.

Change made:

• Before: giving us a accessor, count(), and a setter, setCount()
• After: giving us an accessor, count(), and a setter, setCount()

How did you test this change?

This is a documentation-only change that does not affect any functionality, tests, or build processes.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 814ecd0

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[shshsh-sh]

Link of the origin issue: #2574