fix typos in migration guides documentation.

Original Pull Request spring-projects#2181
Closes spring-projects#2180

Author: gonmmarques

src/main/asciidoc/reference/elasticsearch-migration-guide-4.1-4.2.adoc

@@ -14,7 +14,7 @@ The parameters of the `@Document` annotation that are relevant for  the index se
 == Removals
 
 The `@Score` annotation that was used to set the score return value in an entity was deprecated in version 4.0 and has been removed.
-Scroe values are returned in the `SearchHit` instances that encapsulate the returned entities.
+Score values are returned in the `SearchHit` instances that encapsulate the returned entities.
 
 The `org.springframework.data.elasticsearch.ElasticsearchException` class has been removed.
 The remaining usages have been replaced with `org.springframework.data.mapping.MappingException` and `org.springframework.dao.InvalidDataAccessApiUsageException`.

src/main/asciidoc/reference/elasticsearch-migration-guide-4.3-4.4.adoc

@@ -69,7 +69,7 @@ public class SpringdataElasticTestApplication {
 ====
 
 Remove Spring Data Elasticsearch related properties from your application configuration.
-If Spring Data Elasticsearch was configured using a programmatic configuration (see <<elastisearch.clients>>), remove these beans from the Spring application context.
+If Spring Data Elasticsearch was configured using a programmatic configuration (see <<elasticsearch.clients>>), remove these beans from the Spring application context.
 
 ==== Add dependencies