fix(page): improve id determination

[theEvilReaper]

Proposed changes

Currently, the random custom page ID is generated in the range [0..5], which does not match the resource pack. To avoid missing textures, the range has been updated to [1..6].

Types of changes

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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

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• I have read the CONTRIBUTING.md
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[github-actions]

Test results

216 files  216 suites   1m 46s ⏱️
253 tests 248 ✅  5 💤 0 ❌
762 runs  747 ✅ 15 💤 0 ❌

Results for commit 928f27b.