update index language and seo file name

Author: kmurphypolygon

docs/cdk/index.md

@@ -13,7 +13,7 @@ hide:
    <div class="hero-image"><img src="../img/cdk/cdk.svg" loading="lazy" class="hero-image" style="width: 40%; float: right;"></div>
    <div class="hero-left">
       <h1 class="hero-heading">Polygon CDK</h1>
-      <p class="hero-subtext">Polygon Chain Development Kit (CDK) is a modular, open-source stack for blockchain developers to launch sovereign L2 chains powered by zero-knowledge (ZK) proofs.</p>
+      <p class="hero-subtext">Polygon Chain Development Kit (CDK) is a modular, open-source blockchain stack for developers launching sovereign L2 chains powered by zero-knowledge (ZK) proofs.</p>
    </div>
    </br>
 </div>

mkdocs.yml

@@ -54,7 +54,7 @@ nav:
       - CDK: cdk/index.md
       - Overview: cdk/overview.md
       - Version compatibility matrix: cdk/version-matrix.md
-      - Get started: cdk/getting-started/index.md
+      - Get started: cdk/getting-started/local-deployment.md
       - Concepts:
         - Layer 2s: cdk/concepts/layer2s.md
         - L2 architecture overview: cdk/concepts/architecture.md