[PRO-211, PRO-210] Dashboard: Copy changes (#7476)

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## PR-Codex overview
This PR focuses on making minor adjustments to text labels and descriptions in the application, enhancing consistency in naming and improving grammatical accuracy.

### Detailed summary
- In `apps/dashboard/src/app/(app)/team/[team_slug]/[project_slug]/(sidebar)/webhooks/layout.tsx`, changed `name` from "Contract" to "Contracts".
- In `apps/dashboard/src/app/(app)/team/[team_slug]/[project_slug]/(sidebar)/tokens/page.tsx`, updated the phrase from "Create and Manage tokens for your project" to "Create and manage tokens for your project".

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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **Style**
  * Corrected capitalization in the Assets section header for improved readability.
  * Updated a navigation tab label from "Contract" to "Contracts" for clarity.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: MananTank

apps/dashboard/src/app/(app)/team/[team_slug]/[project_slug]/(sidebar)/tokens/page.tsx

@@ -82,7 +82,7 @@ function AssetsHeader() {
           Tokens
         </h1>
         <p className="text-muted-foreground">
-          Create and Manage tokens for your project
+          Create and manage tokens for your project
         </p>
       </div>
     </div>

apps/dashboard/src/app/(app)/team/[team_slug]/[project_slug]/(sidebar)/webhooks/layout.tsx

@@ -25,7 +25,7 @@ export default async function WebhooksLayout(props: {
         links={[
           {
             exactMatch: true,
-            name: "Contract",
+            name: "Contracts",
             path: `/team/${params.team_slug}/${params.project_slug}/webhooks`,
           },
           {