Fix LinearTrend rending issue

[takechanman1228]

Description

Related Issue

• Closes #
• Related to LinearTrend rending issue #1137

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Modules affected

• MMM
• CLV

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

---

📚 Documentation preview 📚: https://pymc-marketing--1173.org.readthedocs.build/en/1173/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 95.61%. Comparing base (59a35cb) to head (3d706a4).
Report is 121 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1173   +/-   ##
=======================================
  Coverage   95.61%   95.61%           
=======================================
  Files          39       39           
  Lines        4063     4063           
=======================================
  Hits         3885     3885           
  Misses        178      178           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[juanitorduz]

Thanks @takechanman1228 !