[BUG] Line number mismatch in "show line history"

[cychen2021]

Describe the Bug

When the cursor is at line 10, clicking "show line history" will show the history for line 11.

Steps To Reproduce

1. Put your cursor at some line;
2. Click "show line history."

Expected Behavior

It should show the history for line 10.

Environment

• OS: Ubuntu 22.04
• VSCode version: 1.85.2
• Git History version: 0.6.20