Cherry-pick PR #15157: Fix cron expression using wrong Date methods

[Copilot]

Cherry-pick of PR #15157 from release/6.5 to dev. The graph connector timer was using incorrect JavaScript Date methods in its cron expression.

Changes

• File: templates/vsc/ts/graph-connector/src/functions/connections.ts
• Issue: Used getUTCMonth() (returns 0-11) for day field and getUTCDay() (returns 0-6) for month field
• Fix: Use getUTCDate() (returns 1-31) for day and getUTCMonth() + 1 (returns 1-12) for month

// Before
const cronExpression = `0 0 0 ${currentDate.getUTCMonth()} ${currentDate.getUTCDay()} *`;

// After  
const cronExpression = `0 0 0 ${currentDate.getUTCDate()} ${currentDate.getUTCMonth() + 1} *`;

This ensures the deployment timer runs on the correct date each year instead of using invalid month/day values.

Original prompt

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This section details on the original issue you should resolve

<issue_title>[Cherry-pick] PR #15157 needs to be synchronized to other branches</issue_title>
<issue_description>

Cherry-pick Reminder

@Alive-Fish Hello!

This is an automatically created reminder. Your PR #15157 (fix: cron expression in gc is wrong) is being merged into the release/6.5 branch.

Please ensure to cherry-pick these changes to the following branches:

• cherry-pick fix: cron expression in gc is wrong #15157 to dev
• cherry-pick fix: cron expression in gc is wrong #15157 to release/vs1714p7

Steps to Follow:

1. Wait for the current PR to be merged.
2. Execute the following commands locally:

   git fetch origin
   git checkout <target_branch>
   git cherry-pick <commit_hash>
   git push origin <target_branch>

3. Or create a new PR to merge these changes into the above branches.

After completion, please check the items above ✓

Note: This is an automatically created issue. You can close this issue after completing all the operations.
</issue_description>

<agent_instructions>cherry pick the change into dev branch only.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

• Fixes [Cherry-pick] PR #15157 needs to be synchronized to other branches #15158

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