Bug Fix commons-app#2845 (commons-app#2846)

* Show username instead of revision.content in image caption

Author: ashishkumar468

app/src/main/java/fr/free/nrw/commons/review/ReviewActivity.java

@@ -146,7 +146,7 @@ private void updateImage(String fileName) {
                 .subscribe(revision -> {
                     reviewController.firstRevision = revision;
                     reviewPagerAdapter.updateFileInformation(fileName);
-                    ((TextView) imageCaption).setText(fileName + " is uploaded by: " + revision.content());
+                    ((TextView) imageCaption).setText(fileName + " is uploaded by: " + revision.getUser());
                     progressBar.setVisibility(View.GONE);
                 }));
         reviewPager.setCurrentItem(0);