Update Prince package version and Debian reference in Cloud Build configuration

Author: max-ostapenko

cloudbuild.yaml

@@ -10,13 +10,13 @@
 
 substitutions:
   # Update when a new Prince version is released: https://www.princexml.com/latest/
-  # python:3.12 is based on Debian Bookworm (12), so use the debian12 package.
-  _PRINCE_PACKAGE: 'prince_16.1-1_debian12_amd64.deb'
+  # python:3.12 is based on Debian Trixie (13), so use the debian13 package.
+  _PRINCE_PACKAGE: 'prince_16.2-1_debian13_amd64.deb'
 
 steps:
   # ─────────────────────────────────────────────────────────────────────────
   # Step 1: Install dependencies, generate all chapters, run full test suite.
-  # Uses python:3.12 (Debian Bookworm) and installs Node 24 at runtime.
+  # Uses python:3.12 (Debian Trixie) and installs Node 24 at runtime.
   # node_modules persist in /workspace and are reused by later steps;
   # Python packages are re-installed per step.
   # ─────────────────────────────────────────────────────────────────────────