Bump imagemin-gifsicle from 6.0.1 to 7.0.0

Bumps [imagemin-gifsicle](https://github.com/imagemin/imagemin-gifsicle) from 6.0.1 to 7.0.0.
- [Release notes](https://github.com/imagemin/imagemin-gifsicle/releases)
- [Commits](https://github.com/imagemin/imagemin-gifsicle/compare/v6.0.1...v7.0.0)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -39,7 +39,7 @@
     "html-minifier": "^4.0.0",
     "hugo-bin": "0.50.1",
     "imagemin-cli": "^5.1.0",
-    "imagemin-gifsicle": "^6.0.1",
+    "imagemin-gifsicle": "^7.0.0",
     "imagemin-jpegoptim": "^6.0.0",
     "imagemin-mozjpeg": "^8.0.0",
     "imagemin-optipng": "^7.1.0",