Fix typos in reference documentation and contributing guidelines

CONTRIBUTING.adoc

@@ -55,7 +55,7 @@ added after the original pull request but before a merge.
   `./gradlew format`. Note that if you have format violations in `buildSrc`, you can fix
   them by running `./gradlew -p buildSrc format` from the project root directory.
 * The build includes checkstyle rules for many of our code conventions. Run
-  `./gradlew checkstyleMain checkstyleTest` if you want to check you changes are
+  `./gradlew checkstyleMain checkstyleTest` if you want to check your changes are
   compliant.
 * Make sure all new `.java` files have a Javadoc class comment with at least an
   `@author` tag identifying you, and preferably at least a paragraph on what the class is

spring-boot-project/spring-boot-docs/src/docs/asciidoc/production-ready-features.adoc

@@ -1306,7 +1306,7 @@ If you do not want to expose endpoints over HTTP, you can set the management por
 	management.server.port=-1
 ----
 
-This can be achieved using the configprop:management.endpoints.web.exposure.exclude[] property as well, as shown in following example:
+This can be achieved using the configprop:management.endpoints.web.exposure.exclude[] property as well, as shown in the following example:
 
 [source,properties,indent=0,configprops]
 ----
@@ -1721,7 +1721,7 @@ You can also change the interval at which metrics are sent to New Relic:
 	management.metrics.export.newrelic.step=30s
 ----
 
-By default, metrics are published via REST calls but it also possible to use the Java Agent API if you have it on the classpath:
+By default, metrics are published via REST calls but it is also possible to use the Java Agent API if you have it on the classpath:
 
 [source,properties,indent=0,configprops]
 ----