DEVX-796: readme update for requirements

Author: ShipilA

examples/spring-datadog-statsd/README.md

@@ -4,6 +4,8 @@ Example to show how Java SDK can be used in a Spring Boot application with Datad
 
 ## Requirements
 
+- Java 21 or higher
+- Gradle 8.14 or higher
 - A Composable Commerce Project with a configured [API Client](https://docs.commercetools.com/tutorials/getting-started#creating-an-api-client).
   Necessary scopes: `view_published_products`, `manage_orders`
 - Your Project must have existing products containing variants with SKUs, and at least one customer, the storefront search endpoint must be active.

examples/spring-datadog/README.md

@@ -4,6 +4,8 @@ Example to show how Java SDK can be used in a Spring Boot application with Datad
 
 ## Requirements
 
+- Java 21 or higher
+- Gradle 8.14 or higher
 - A Composable Commerce Project with a configured [API Client](https://docs.commercetools.com/tutorials/getting-started#creating-an-api-client).
   Necessary scopes: `view_published_products`, `manage_orders`
 - Your Project must have existing products containing variants with SKUs, and at least one customer, the storefront search endpoint must be active.

examples/spring-newrelic/README.md

@@ -4,6 +4,8 @@ Example to show how Java SDK can be used in a Spring Boot application with NewRe
 
 ## Requirements
 
+- Java 21 or higher
+- Gradle 8.14 or higher
 - A Composable Commerce Project with a configured [API Client](https://docs.commercetools.com/tutorials/getting-started#creating-an-api-client).
   Necessary scopes: `view_published_products`, `manage_orders`
 - Your Project must have existing products containing variants with SKUs, and at least one customer, the storefront search endpoint must be active.

examples/spring-otel/README.md

@@ -6,6 +6,8 @@ OpenTelemetry auto instrumentation.
 
 ## Requirements
 
+- Java 21 or higher
+- Gradle 8.14 or higher
 - A Composable Commerce Project with a configured [API Client](https://docs.commercetools.com/tutorials/getting-started#creating-an-api-client).
   Necessary scopes: `view_published_products`, `manage_orders`
 - Your Project must have existing products containing variants with SKUs, and at least one customer, the storefront search endpoint must be active.

examples/spring/README.md

@@ -4,6 +4,8 @@ Example to show how the ME endpoints can be used with the Java SDK in a Spring B
 
 ## Requirements
 
+- Java 21 or higher
+- Gradle 8.14 or higher
 - A Composable Commerce Project with a configured [API Client](https://docs.commercetools.com/tutorials/getting-started#creating-an-api-client).
   Necessary scopes: `view_published_products`, `view_categories`, `manage_my_profile`, `manage_my_shopping_lists`, `manage_my_payments`, `manage_my_orders`
 - Your Project must have existing products containing variants with SKUs, and at least one customer, the storefront search endpoint must be active.