Update ruflin/elastica requirement from ^7.1 to ^8.0

Updates the requirements on [ruflin/elastica](https://github.com/ruflin/Elastica) to permit the latest version.
- [Release notes](https://github.com/ruflin/Elastica/releases)
- [Changelog](https://github.com/ruflin/Elastica/blob/8.x/CHANGELOG.md)
- [Commits](ruflin/Elastica@7.1.0...8.0.0)

---
updated-dependencies:
- dependency-name: ruflin/elastica
  dependency-type: direct:production
...

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

composer.json

@@ -19,7 +19,7 @@
     },
     "require": {
         "cakephp/cakephp": "^5.0.0",
-        "ruflin/elastica": "^7.1"
+        "ruflin/elastica": "^8.0"
     },
     "require-dev": {
         "cakephp/cakephp-codesniffer": "^5.0",