docs: fix spelling in markdown docs

[kranthipoturaju]

Summary

• Refined README contribution phrasing for consistent terminology and smoother wording (e.g., "Plugin," "Afterwards," and "To have a pull request integrated").
• Improved FAQ punctuation, metadata terminology, and heading consistency for readability.
• Polished the site index text for spacing, GitHub capitalization, and clearer phrasing in usage guidance.

[Copilot]

Pull request overview

This pull request fixes spelling and grammatical errors throughout the markdown documentation files for the versions-maven-plugin. The changes improve readability and correctness of the documentation without altering any functional code or behavior.

Changes:

• Fixed spelling errors including "mis-match" → "mismatch", "ependencies" → "dependencies", "dependencyManagment" → "dependencyManagement", and "An finally" → "And finally"
• Corrected duplicate words, particularly "comma separated separated" → "comma separated" appearing in multiple documentation files
• Improved punctuation by adding commas after introductory phrases like "By default" and "Furthermore" for better readability

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
versions-maven-plugin/src/site/markdown/index.md	Fixed "mis-match" to "mismatch" in version mojo description
versions-maven-plugin/src/site/markdown/examples/use-releases.md	Removed duplicate word "separated" in parameter description
versions-maven-plugin/src/site/markdown/examples/update-properties.md.vm	Removed duplicate word "separated" in parameter description
versions-maven-plugin/src/site/markdown/examples/unlock-snapshots.md	Fixed typo "ependencies" to "dependencies" and removed duplicate "separated"
versions-maven-plugin/src/site/markdown/examples/setaggregator.md	Corrected "An finally" to "And finally" and added comma after "Furthermore"
versions-maven-plugin/src/site/markdown/examples/resolve-ranges.md	Removed duplicate word "separated" in parameter description
versions-maven-plugin/src/site/markdown/examples/display-property-updates.md	Improved grammar by adding comma before "and" in list
versions-maven-plugin/src/site/markdown/examples/compare-dependencies.md	Added commas after "By default" in three locations
versions-maven-plugin/src/site/markdown/examples/advancing-dependency-versions.md.vm	Fixed "dependencyManagment" to "dependencyManagement" (2 occurrences) and removed duplicate "separated"

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