Bump smarty/smarty from 4.5.3 to 5.5.1

Bumps [smarty/smarty](https://github.com/smarty-php/smarty) from 4.5.3 to 5.5.1.
- [Release notes](https://github.com/smarty-php/smarty/releases)
- [Changelog](https://github.com/smarty-php/smarty/blob/master/CHANGELOG.md)
- [Commits](smarty-php/smarty@v4.5.3...v5.5.1)

---
updated-dependencies:
- dependency-name: smarty/smarty
  dependency-version: 5.5.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

composer.json

@@ -11,7 +11,7 @@
         "symfony/yaml": "^5.0",
         "google/cloud-storage": "^1.12",
         "opencensus/opencensus-exporter-stackdriver": "^0.1.0",
-        "smarty/smarty": "^4.5.3",
+        "smarty/smarty": "^5.5.1",
         "sendgrid/sendgrid": "^7.3",
         "google/cloud-logging": "^1.18",
         "auth0/auth0-php": "^8.0.5",