Bump bootstrap from 5.0.2 to 5.1.0 in /src/playground (Azure#3901)

Bumps [bootstrap](https://github.com/twbs/bootstrap) from 5.0.2 to 5.1.0.
- [Release notes](https://github.com/twbs/bootstrap/releases)
- [Commits](twbs/bootstrap@v5.0.2...v5.1.0)

---
updated-dependencies:
- dependency-name: bootstrap
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

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

Author: dependabot[bot]

src/playground/package-lock.json

@@ -40,7 +40,7 @@
     "webpack-dev-server": "^3.11.2"
   },
   "dependencies": {
-    "bootstrap": "^5.0.2",
+    "bootstrap": "^5.1.0",
     "monaco-editor": "^0.26.1",
     "pako": "^2.0.4",
     "react": "^17.0.2",