Update WordPress/src/main/java/org/wordpress/android/ui/reader/views/ReaderSiteHeaderView.java

Co-authored-by: claude[bot] <209825114+claude[bot]@users.noreply.github.com>

Author: adalpari

WordPress/src/main/java/org/wordpress/android/ui/reader/views/ReaderSiteHeaderView.java

@@ -56,7 +56,7 @@ public interface OnBlogInfoLoadedListener {
     private boolean mIsFeed;
 
     private ReaderFollowButton mFollowButton;
-    private ProgressBar mFollowProgress;
+    @Nullable private ProgressBar mFollowProgress;
     private ReaderBlog mBlogInfo;
     private OnBlogInfoLoadedListener mBlogInfoListener;
     private OnFollowListener mFollowListener;