deps: bump minimum icu version to 67

Bump minimum version of ICU needed to build node to 67.

Refs: v8/v8@611e412

Backport-PR-URL: #34356
PR-URL: #33579
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>

tools/icu/icu_versions.json

@@ -1,3 +1,3 @@
 {
-    "minimum_icu": 65
+    "minimum_icu": 67
 }