Update upstream.md

Co-authored-by: Francesco Pham <[email protected]>
Signed-off-by: Stefan Schmidt <[email protected]>

upstream.md

@@ -28,10 +28,10 @@ Creating a new repository is necessary for new add-ons. Once the add-on is
 pushed, it can be referenced in the forked manifest and included in the CI
 build.
 
-We also encourage every developer to directly upstream fixes and enhancements
-into into the Gitee repositories from OpenHarmony, if possible. These changes
-will come back to Eclipse Oniro with the next release, or earlier, if backported
-in the current release branches on Gitee.
+We also encourage every developer, if possible, to directly upstream fixes
+and enhancements into OpenHarmony's Gitee repositories. These changes
+will return to Eclipse Oniro with the next release, or earlier if backported
+to the current release branches on Gitee.
 
 ## Upstreaming into OpenHarmony