chore: add gitleaks

.github/workflows/gitleaks.yml

@@ -0,0 +1,16 @@
+name: gitleaks
+on:
+  push:
+  pull_request:
+
+jobs:
+  scan:
+    name: gitleaks
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: gitleaks/gitleaks-action@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

README.md

@@ -2,7 +2,6 @@
 
 [![Go](https://github.com/haunt98/changeloguru/workflows/Go/badge.svg?branch=main)](https://github.com/haunt98/changeloguru/actions)
 [![Go Reference](https://pkg.go.dev/badge/github.com/haunt98/changeloguru.svg)](https://pkg.go.dev/github.com/haunt98/changeloguru)
-[![codecov](https://codecov.io/gh/haunt98/changeloguru/branch/main/graph/badge.svg?token=ZBG353F0CN)](https://codecov.io/gh/haunt98/changeloguru)
 [![Latest Version](https://img.shields.io/github/v/tag/haunt98/changeloguru)](https://github.com/haunt98/changeloguru/tags)
 
 Tool to generate `CHANGELOG.md`, `CHANGELOG.rst` from