Fix typos in Docs

Author: 0xflotus

src/reference/asciidoc/kafka.adoc

@@ -2428,7 +2428,7 @@ public ConsumerFactory<Foo, Bar> kafkaConsumerFactory(KafkaProperties properties
 }
 
 @Bean
-public ProducererFactory<Foo, Bar> kafkaProducerFactory(KafkaProperties properties,
+public ProducerFactory<Foo, Bar> kafkaProducerFactory(KafkaProperties properties,
     JsonSserializer customSerializer) {
 
     return new DefaultKafkaConsumerFactory<>(properties.buildProducerProperties(),

src/reference/asciidoc/testing.adoc

@@ -385,7 +385,7 @@ public static <V> Matcher<ConsumerRecord<?, V>> hasValue(V value) { ... }
 public static Matcher<ConsumerRecord<?, ?>> hasPartition(int partition) { ... }
 
 /**
- * Matcher testing the timestamp of a {@link ConsumerRecord} asssuming the topic has been set with
+ * Matcher testing the timestamp of a {@link ConsumerRecord} assuming the topic has been set with
  * {@link org.apache.kafka.common.record.TimestampType#CREATE_TIME CreateTime}.
  *
  * @param ts timestamp of the consumer record.

src/reference/asciidoc/whats-new.adoc

@@ -61,7 +61,7 @@ The `HeaderEnricher` transformer has been provided, using SpEL to generate the h
 See <<streams-header-enricher>> for more information.
 
 The `MessagingTransformer` has been provided.
-This allows a Kafka streams topoology to interact with a spring-messaging component, such as a Spring Integration flow.
+This allows a Kafka streams topology to interact with a spring-messaging component, such as a Spring Integration flow.
 See <<streams-messaging>> and <<streams-integration>> for more information.
 
 ==== JSON Component Changes