Fix KafkaStreamBrancher doc typos

Fixes #1459

Author: garyrussell

spring-kafka/src/main/java/org/springframework/kafka/support/KafkaStreamBrancher.java

@@ -31,7 +31,7 @@
  * Example of usage:
  * <pre>
  * {@code
- * new KafkaStreamsBrancher<String, String>()
+ * new KafkaStreamBrancher<String, String>()
  *    .branch((key, value) -> value.contains("A"), ks->ks.to("A"))
  *    .branch((key, value) -> value.contains("B"), ks->ks.to("B"))
  *    //default branch should not necessarily be defined in the end

spring-kafka/src/test/java/org/springframework/kafka/support/KafkaStreamsBrancherTests.java renamed to spring-kafka/src/test/java/org/springframework/kafka/support/KafkaStreamBrancherTests.java

@@ -35,7 +35,7 @@
  *
  * @since 2.2.4
  */
-class KafkaStreamsBrancherTests {
+class KafkaStreamBrancherTests {
 
 	@Test
 	@SuppressWarnings({ "unchecked", "rawtypes" })

src/reference/asciidoc/streams.adoc

@@ -169,7 +169,7 @@ stream.through(new JsonSerde<>(MyKeyType.class)
 ----
 ====
 
-==== Using `KafkaStreamsBrancher`
+==== Using `KafkaStreamBrancher`
 
 The `KafkaStreamBrancher` class introduces a more convenient way to build conditional branches on top of `KStream`.
 
@@ -194,7 +194,7 @@ The following example uses `KafkaStreamBrancher`:
 ====
 [source,java]
 ----
-new KafkaStreamsBrancher<String, String>()
+new KafkaStreamBrancher<String, String>()
    .branch((key, value) -> value.contains("A"), ks -> ks.to("A"))
    .branch((key, value) -> value.contains("B"), ks -> ks.to("B"))
    //default branch should not necessarily be defined in the end of the chain!