Update renoki-co/php-k8s requirement from ^3.6 to ^3.7

Updates the requirements on [renoki-co/php-k8s](https://github.com/renoki-co/php-k8s) to permit the latest version.
- [Release notes](https://github.com/renoki-co/php-k8s/releases)
- [Commits](renoki-co/php-k8s@3.6.0...3.7.0)

---
updated-dependencies:
- dependency-name: renoki-co/php-k8s
  dependency-type: direct:production
...

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

composer.json

@@ -20,7 +20,7 @@
         }
     ],
     "require": {
-        "renoki-co/php-k8s": "^3.6"
+        "renoki-co/php-k8s": "^3.7"
     },
     "autoload": {
         "psr-4": {