Update test instructions in to-test.md for Jetpack 15.2 (#45629)

* Update test instructions in to-test.md for Jetpack 15.2

* Add changelog

* Remove unnecessary code snippet mention

Author: manzoorwanijk

projects/plugins/jetpack/changelog/update-to-test-15.2

@@ -0,0 +1,5 @@
+Significance: patch
+Type: other
+Comment: Updating to-test.md.
+
+

projects/plugins/jetpack/to-test.md

@@ -1,4 +1,4 @@
-## Jetpack 15.1.1
+## Jetpack 15.2
 
 ### Before you start
 
@@ -10,3 +10,88 @@
   - Or add the following to something like a code snippet plugin: `add_filter( 'jetpack_blocks_variation', function () { return 'beta'; } );`
 
 You can see a [full list of changes in this release here](https://github.com/Automattic/jetpack-production/blob/trunk/CHANGELOG.md). Please feel free to test any and all functionality mentioned!
+
+### Forms
+
+#### Image Select Field
+
+The image select field is under the beta flag, so to test it just enable beta blocks.
+
+- Test the block with different images, options, styles, etc.
+- If possible, try different themes as well.
+- Once a response is sent, it should be visible in the Forms dashboard.
+- Try viewing the responses there and exporting them.
+
+#### Other improvements
+
+There are other small changes and new features for the Forms inbox
+
+- [Added read/unread state to the UI](https://github.com/Automattic/jetpack/pull/45350)
+- [Add response view actions](https://github.com/Automattic/jetpack/pull/45352)
+- [More fun and elaborate empty states](https://github.com/Automattic/jetpack/pull/45421)
+
+### Sharing Buttons Block
+
+Related PRs: #45484
+
+#### Testing Steps:
+
+- Go to Posts > Add New
+- Insert sharing buttons block
+- Add Reddit button
+- Verify new logo appears in editor
+- Publish post
+- View on frontend and verify new logo displays correctly
+
+### Slideshow Block
+
+Related PRs: #45500, #45164
+
+#### Testing Steps:
+
+##### Image Size Selection (#45500):
+
+- Add Slideshow block with multiple images
+- Wait for post to fully load
+- Change image size via sidebar settings
+- Verify change reflects immediately in editor
+- Save post and verify correct size shows on frontend
+- On Simple sites: Note that thumbnail size may differ from 150×150 (this is expected)
+
+### Maps Block
+
+Related PRs: #45476
+
+#### Critical Fix – High Priority Testing
+
+#### Testing Steps:
+
+- Edit post or page content
+- Add Map block
+- Add a marker to the map
+- Verify block renders properly without error message
+- Add multiple markers
+- Verify map updates to show region displaying all markers
+- Confirm no “This block has encountered an error” message appears
+
+### Newsletter Settings
+
+Related PRs: #45368
+
+#### Testing Steps:
+
+- Go to Jetpack > Settings > Newsletter
+- Enable the feature
+- Scroll to “Sender name and reply-to settings”
+- Select “Replies will be sent to the post author’s email”
+- Verify explanatory text updates appropriately
+
+### My Jetpack Page
+
+Related PRs: #45474
+
+#### Testing Steps:
+
+- Enable Hello Dolly plugin
+- Go to My Jetpack page
+- Verify page displays correctly without visual issues