Fix another batch of spelling typos (#13915)

* Fix typos

* Remove repeated words

* Minor grammar fixes

samples/client/petstore/java/feign-no-nullable/api/openapi.yaml

@@ -370,7 +370,7 @@ paths:
       x-accepts: application/json
     get:
       description: For valid response try integer IDs with value <= 5 or > 10. Other
-        values will generated exceptions
+        values will generate exceptions
       operationId: getOrderById
       parameters:
       - description: ID of pet that needs to be fetched
@@ -672,7 +672,7 @@ paths:
       responses:
         "400":
           content: {}
-          description: Someting wrong
+          description: Something wrong
       summary: Fake endpoint to test group parameters (optional)
       tags:
       - fake

samples/client/petstore/java/feign-no-nullable/src/main/java/org/openapitools/client/api/StoreApi.java

@@ -68,7 +68,7 @@ public interface StoreApi extends ApiClient.Api {
 
   /**
    * Find purchase order by ID
-   * For valid response try integer IDs with value <= 5 or > 10. Other values will generated exceptions
+   * For valid response try integer IDs with value <= 5 or > 10. Other values will generate exceptions
    * @param orderId ID of pet that needs to be fetched (required)
    * @return Order
    */
@@ -81,7 +81,7 @@ public interface StoreApi extends ApiClient.Api {
   /**
    * Find purchase order by ID
    * Similar to <code>getOrderById</code> but it also returns the http response headers .
-   * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generated exceptions
+   * For valid response try integer IDs with value &lt;&#x3D; 5 or &gt; 10. Other values will generate exceptions
    * @param orderId ID of pet that needs to be fetched (required)
    * @return A ApiResponse that wraps the response boyd and the http headers.
    */

samples/client/petstore/java/feign-no-nullable/src/test/java/org/openapitools/client/api/StoreApiTest.java

@@ -53,7 +53,7 @@ class StoreApiTest {
     /**
      * Find purchase order by ID
      *
-     * For valid response try integer IDs with value <= 5 or > 10. Other values will generated exceptions
+     * For valid response try integer IDs with value <= 5 or > 10. Other values will generate exceptions
      */
     @Test
     void getOrderByIdTest() {