Parse the version correctly when using gz log subcommands (backport #750)

[mergify]

🦟 Bug fix

Fixes #742

Summary

It looks like the stand-alone gz-transport-log-main executable wasn't properly parsing the version number.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
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This is an automatic backport of pull request #750 done by [Mergify](https://mergify.com).

[scpeters]

I believe the Ubuntu CI is failing since we disabled nightly repos for gz-transport15 in gazebo-tooling/gzdev#100 (comment)

I think this fix is to bump the main branch major version (gazebo-tooling/release-tools#1403 (comment))

[scpeters]

I believe the Ubuntu CI is failing since we disabled nightly repos for gz-transport15 in gazebo-tooling/gzdev#100 (comment)

I think this fix is to bump the main branch major version (gazebo-tooling/release-tools#1403 (comment))

never mind; I think #752 is the needed fix