chore: update dependency preact to <=10.26.5

Author: renovate[bot]

package-lock.json

@@ -115,7 +115,7 @@
     "mocha-test-container-support": "^0.2.0",
     "mri": "^1.2.0",
     "npm-run-all2": "^7.0.2",
-    "preact": ">=10.5.14 <=10.15.1",
+    "preact": "<=10.26.5",
     "prettier": "^3.5.3",
     "puppeteer": "^23.0.0",
     "raw-loader": "^4.0.2",