Fix typos. (#3058)

docs/en/guides/How-to-release.md

@@ -269,9 +269,9 @@ SkyWalking Resources:
 - Documents: https://github.com/apache/skywalking/blob/x.y.z/docs/README.md
 
 
-- Apache SkyWalking  Team
+- Apache SkyWalking Team
 ```
 
 7. Update website download page. http://skywalking.apache.org/downloads/ . Include new download source, distribution, sha512, asc and document
 links. Links could be found by following above rules(3)-(6).
-8. Add an release event on website homepage and even page. Announce the public release with changelog or key features.
+8. Add a release event on website homepage and even page. Announce the public release with changelog or key features.

docs/en/guides/Java-Plugin-Development-Guide.md

@@ -316,7 +316,7 @@ Use the core APIs in before, after and exception handle stages.
 We are welcome everyone to contribute plugins.
 
 Please follow there steps:
-1. Submit an issue about which plugins are you going to contribute, including supported version.
+1. Submit an issue about which plugins you are going to contribute, including supported version.
 1. Create sub modules under `apm-sniffer/apm-sdk-plugin` or `apm-sniffer/optional-plugins`, and the name should include supported library name and versions
 1. Follow this guide to develop. Make sure comments and test cases are provided.
 1. Develop and test.

docs/en/guides/README.md

 # Guides
 There are many ways that you can help the SkyWalking community.
 
-- Go through our documents, point out or fixed unclear things. Translate the documents to other languages.
+- Go through our documents, point out or fix unclear things. Translate the documents to other languages.
 - Download our [releases](http://skywalking.apache.org/downloads/), try to monitor your applications, and feedback to us about 
 what you think.
 - Read our source codes, Ask questions for details.