build(deps-dev): bump ts-loader from 8.0.14 to 8.0.15 in /html (#597)

Bumps [ts-loader](https://github.com/TypeStrong/ts-loader) from 8.0.14 to 8.0.15.
- [Release notes](https://github.com/TypeStrong/ts-loader/releases)
- [Changelog](https://github.com/TypeStrong/ts-loader/blob/master/CHANGELOG.md)
- [Commits](https://github.com/TypeStrong/ts-loader/compare/v8.0.14...v8.0.15)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

html/package.json

@@ -52,7 +52,7 @@
     "style-loader": "^2.0.0",
     "terser-webpack-plugin": "^4.2.3",
     "through2": "^4.0.2",
-    "ts-loader": "^8.0.14",
+    "ts-loader": "^8.0.15",
     "tslint": "^6.1.3",
     "tslint-loader": "^3.5.4",
     "typescript": "^3.9.7",