Bump grunt from 1.0.4 to 1.3.0 in /docs/src (#8246)

Bumps [grunt](https://github.com/gruntjs/grunt) from 1.0.4 to 1.3.0.
- [Release notes](https://github.com/gruntjs/grunt/releases)
- [Changelog](https://github.com/gruntjs/grunt/blob/main/CHANGELOG)
- [Commits](https://github.com/gruntjs/grunt/compare/v1.0.4...v1.3.0)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

docs/src/package.json

@@ -5,7 +5,7 @@
     "lodash": "^4.17.21"
   },
   "devDependencies": {
-    "grunt": "^1.0.4",
+    "grunt": "^1.3.0",
     "grunt-contrib-concat": "^1.0.1",
     "grunt-contrib-imagemin": "^3.1.0",
     "grunt-contrib-uglify": "^4.0.0",