rename cdk get started

Author: kmurphypolygon

mkdocs.yml

@@ -54,7 +54,7 @@ nav:
       - CDK: cdk/index.md
       - Overview: cdk/overview.md
       - Version compatibility matrix: cdk/version-matrix.md
-      - Get started: '!import https://github.com/0xPolygon/kurtosis-cdk?branch=main'
+      - Build: '!import https://github.com/0xPolygon/kurtosis-cdk?branch=main'
       - Architecture:
         - CDK rollup: cdk/architecture/cdk-zkevm.md
         - CDK validium: cdk/architecture/cdk-validium.md