feat(templates): allow isMinor

[viceice]

Changes

isMinor is missing in allowed templates 😕

Context

INFO: Disallowed variable names in template (repository=forgejo/runner, branch=renovate/minor-1.22-golang-packages)
       "varNames": ["isMinor"],
       "template": "to {{#if isPinDigest}}{{{newDigestShort}}}{{else}}{{#if isMajor}}{{prettyNewMajor}}{{else}}{{#if isMinor}}v{{newMajor}}.{{newMinor}}{{else}}{{#if isSingleVersion}}{{prettyNewVersion}}{{else}}{{#if newValue}}{{{newValue}}}{{else}}{{{newDigestShort}}}{{/if}}{{/if}}{{/if}}{{/if}}{{/if}}"

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please select one)

I have verified these changes via:

• Code inspection only, or
• Newly added/modified unit tests, or
• No unit tests but ran on a real repository, or
• Both unit tests + ran on a real repository

[renovate-release]

🎉 This issue has been resolved in version 38.51.0 🎉

The release is available on:

• GitHub release
• npm package (@latest dist-tag)
• 38.51.0

Your semantic-release bot 📦🚀