fix: remove debug print statement and fix error messages in dependency updater

[pashka8]

Changes Made

• Removed debug print statement from writeToVersionsJson() function
• Fixed error messages in createGitMessageEnv() function to reference correct filename (commit_message.env instead of git_commit_message.env)

Files Modified

• dependency_updater/dependency_updater.go

Summary

This PR addresses minor code quality issues by removing a leftover debug statement and correcting error message references to match the actual filename being created.

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 1/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 0 Sum 1