fix: Prevent render counters from departing to top-right corner

Fixes #1006

Problem:
In the subscriptions example, the render counter overlays drift to the
top-right corner of the window instead of staying positioned relative
to their respective forms.

Root Cause:
The counters use 'position: absolute' but the form element lacks
'position: relative', causing them to position relative to the viewport
instead of the form container.

Solution:
Added 'position: relative' to the form element in Styles.js. This
establishes the form as the positioning context for the absolutely
positioned render counters.

Changes:
- examples/subscriptions/Styles.js:
  - Added 'position: relative' to form CSS rule (line 56)

Impact:
✅ Render counters stay anchored to their forms
✅ Visual layout matches intended design
✅ No functional changes
✅ Example-only change, no library code affected

Originally reported by @chervyakovru in PR #1006 (closed as stale).

Co-authored-by: Daniil Chervyakov <chervyakovru@users.noreply.github.com>

Author: erikras-dinesh-agent

examples/subscriptions/Styles.js

@@ -53,6 +53,7 @@ export default styled.div`
   }
 
   form {
+    position: relative;
     max-width: 500px;
     margin: 10px auto;
     border: 1px solid #ccc;