[hibernate#1338] Fix typos in comments and javadocs

Author: DavideD

hibernate-reactive-core/src/main/java/org/hibernate/reactive/persister/entity/impl/ReactiveAbstractEntityPersister.java

@@ -401,7 +401,7 @@ default CompletionStage<Serializable> insertReactive(
 		return getReactiveConnection( session )
 				//Note: in ORM core there are other ways to fetch the generated identity:
 				//      getGeneratedKeys(), or an extra round select statement. But we
-				//      don't need these extra options.
+				//      don't need those extra options.
 				.insertAndSelectIdentifier( sql, params, idClass, delegate().getIdentifierColumnNames()[0] )
 				.thenApply( this::convertGeneratedId );
 	}

hibernate-reactive-core/src/test/java/org/hibernate/reactive/IdentityGeneratorTypeForCockroachDBTest.java

@@ -65,7 +65,7 @@ protected Collection<Class<?>> annotatedEntities() {
 	@Override
 	protected Configuration constructConfiguration() {
 		Configuration configuration = super.constructConfiguration();
-		// It's the default but I want to highlight what we are testing
+		// It's the default, but I want to highlight what we are testing
 		configuration.setProperty( AvailableSettings.USE_GET_GENERATED_KEYS, "false" );
 		return configuration;
 	}