fix(deps): update dependency preact-render-to-string to v6

Author: renovate[bot]

package.json

@@ -32,7 +32,7 @@
     "markdown-to-jsx": "7.1.9",
     "preact": "10.13.1",
     "preact-cli-plugin-netlify": "1.6.0",
-    "preact-render-to-string": "5.2.6",
+    "preact-render-to-string": "6.2.2",
     "preact-router": "4.1.0",
     "parse-md": "3.0.3"
   },

yarn.lock

@@ -9292,10 +9292,10 @@ preact-render-spy@1.3.0:
     object.entries "^1.0.4"
     preact-render-to-string "^3.6.3"
 
-preact-render-to-string@5.2.6:
-  version "5.2.6"
-  resolved "https://registry.yarnpkg.com/preact-render-to-string/-/preact-render-to-string-5.2.6.tgz#0ff0c86cd118d30affb825193f18e92bd59d0604"
-  integrity sha512-JyhErpYOvBV1hEPwIxc/fHWXPfnEGdRKxc8gFdAZ7XV4tlzyzG847XAyEZqoDnynP88akM4eaHcSOzNcLWFguw==
+preact-render-to-string@6.2.2:
+  version "6.2.2"
+  resolved "https://registry.yarnpkg.com/preact-render-to-string/-/preact-render-to-string-6.2.2.tgz#eb086b6db5d57468ab2c184896884fb0a818245d"
+  integrity sha512-YDfXQiVeYZutFR8/DpxLSbW3W6b7GgjBExRBxOOqcjrGq5rA9cziitQdNPMZe4RVMSdfBnf4hYqyeLs/KvtIuA==
   dependencies:
     pretty-format "^3.8.0"