Reindex: Fixed typo in assertion failure message (#30619)

Fix a typo in an assertion failure message.

modules/reindex/src/main/java/org/elasticsearch/index/reindex/RestReindexAction.java

@@ -115,7 +115,7 @@ public class RestReindexAction extends AbstractBaseReindexRestHandler<ReindexReq
     @Override
     protected ReindexRequest buildRequest(RestRequest request) throws IOException {
         if (request.hasParam("pipeline")) {
-            throw new IllegalArgumentException("_reindex doesn't support [pipeline] as a query parmaeter. "
+            throw new IllegalArgumentException("_reindex doesn't support [pipeline] as a query parameter. "
                     + "Specify it in the [dest] object instead.");
         }
         ReindexRequest internal = new ReindexRequest(new SearchRequest(), new IndexRequest());

modules/reindex/src/test/java/org/elasticsearch/index/reindex/RestReindexActionTests.java

@@ -149,7 +149,7 @@ public class RestReindexActionTests extends ESTestCase {
         request.withParams(singletonMap("pipeline", "doesn't matter"));
         Exception e = expectThrows(IllegalArgumentException.class, () -> action.buildRequest(request.build()));
 
-        assertEquals("_reindex doesn't support [pipeline] as a query parmaeter. Specify it in the [dest] object instead.", e.getMessage());
+        assertEquals("_reindex doesn't support [pipeline] as a query parameter. Specify it in the [dest] object instead.", e.getMessage());
     }
 
     public void testSetScrollTimeout() throws IOException {