fix(ng-dev): downgrade @google-cloud/spanner to 8.0.0

See: googleapis/nodejs-spanner#2375

Author: alan-agius4

.aspect/rules/external_repository_action_cache/npm_translate_lock_LTkzNjczMzk3Mw==

@@ -19,8 +19,8 @@ github-actions/previews/upload-artifacts-to-firebase/package.json=-2021238010
 github-actions/pull-request-labeling/package.json=-197755049
 github-actions/saucelabs/package.json=855472374
 github-actions/unified-status-check/package.json=-337882335
-ng-dev/package.json=1323489217
+ng-dev/package.json=-1393092544
 package.json=945382576
-pnpm-lock.yaml=436244933
+pnpm-lock.yaml=-237643834
 pnpm-workspace.yaml=1110472849
 yarn.lock=-1532471435

ng-dev/package.json

@@ -16,7 +16,7 @@
   },
   "dependencies": {
     "@actions/core": "1.11.1",
-    "@google-cloud/spanner": "8.1.0",
+    "@google-cloud/spanner": "8.0.0",
     "@google/genai": "1.13.0",
     "@inquirer/prompts": "7.8.0",
     "@inquirer/type": "3.0.8",