Fix typos (#261)

Author: elharo

maven-plugin-testing-harness/src/site/markdown/examples/multiproject.md

@@ -37,7 +37,7 @@ public class MyMojo extends AbstractMojo {
 To test a Mojo in a multiproject area, you need to define several stubs, i.e. for the main test project and its modules.
 
 
-### Configure Mian project and create Stubs for the sub projects
+### Configure main project and create Stubs for the subprojects
 
 ```java
 import org.apache.maven.api.plugin.testing.MojoTest;

maven-plugin-testing-harness/src/site/markdown/getting-started/index.md

@@ -112,7 +112,7 @@ class MyMojoTest {
 ```
 
 
-**Note**: By convention, projects for unit testing your should be in the test resources directory.
+**Note**: By convention, projects for unit testing should be in the test resources directory.
 
 #### Configuring `project-to-test` POM