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 <[email protected]>
Reviewed-By: Jiawen Geng <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Shelley Vohr <[email protected]>

tools/icu/icu_versions.json

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