Update dependency ember-page-title to v9 (#96)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -59,7 +59,7 @@
     "ember-cli-terser": "4.0.2",
     "ember-focus-trap": "1.1.1",
     "ember-load-initializers": "3.0.1",
-    "ember-page-title": "7.0.0",
+    "ember-page-title": "9.0.3",
     "ember-qunit": "6.2.0",
     "ember-resolver": "10.1.1",
     "ember-source": "4.12.4",