docs: improve README examples of stats/base/dists/geometric namespace

[ShivamAhir]

Resolves # .

Description

Purpose of this pull request is to add example in stats/base/dists/geometric

This pull request:

• Add examples of the functions present in stats/base/dists/geometric namespace
• adds example demonstration using stdev functions in the README.
• Adds the same demonstration example in examples/index.js.

Related Issues

resolve improve README examples of stats/base/dists/geometric #1628

This pull request:

• resolves #
• fixes #

Questions

Any questions for reviewers of this pull request?

No.

Other

Any other information relevant to this pull request? This may include screenshots, references, and/or implementation notes.

No.

Checklist

Please ensure the following tasks are completed before submitting this pull request.

• Read, understood, and followed the contributing guidelines.

---

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[stdlib-bot]

PR Commit Message

docs: improve README examples of `stats/base/dists/geometric` namespace

PR-URL: https://github.com/stdlib-js/stdlib/pull/1801
Ref: https://github.com/stdlib-js/stdlib/issues/1628

Co-authored-by: Philipp Burckhardt <pburckhardt@outlook.com>
Co-authored-by: shivam Ahir <11shivam00@gmail.com>
Reviewed-by: Philipp Burckhardt <pburckhardt@outlook.com>

Please review the above commit message and make any necessary adjustments.