Bump preact-render-to-string from 6.2.2 to 6.5.11 in /webapp

Bumps [preact-render-to-string](https://github.com/preactjs/preact-render-to-string) from 6.2.2 to 6.5.11.
- [Release notes](https://github.com/preactjs/preact-render-to-string/releases)
- [Changelog](https://github.com/preactjs/preact-render-to-string/blob/main/CHANGELOG.md)
- [Commits](preactjs/preact-render-to-string@6.2.2...v6.5.11)

---
updated-dependencies:
- dependency-name: preact-render-to-string
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

webapp/package-lock.json

@@ -10,7 +10,7 @@
 	"dependencies": {
 		"preact": "^10.18.2",
 		"preact-iso": "^2.3.2",
-		"preact-render-to-string": "^6.2.2"
+		"preact-render-to-string": "^6.5.11"
 	},
 	"devDependencies": {
 		"@preact/preset-vite": "^2.5.0",