Add v before version number for consistency

[HonkingGoose]

• I provide my work under the project license.
• I grant such license of my work as is required for the purposes of future print editions to Ben Straub and Scott Chacon.

Changes

• Add v before version number for consistency

Context

Throughout the tagging section we prepend any version numbers with "v", this commit ensures that we're consistent throughout. This also closes issue #852 that found some inconsistencies with the way we use tags.

Fixes #852