Fix image path in build-distribution gradle upload docs

The android-metadata.png image is in the size-analysis directory, so the path needs to be relative to that location.

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Co-Authored-By: Claude <[email protected]>

Author: runningcode

includes/build-distribution/upload-gradle.mdx

@@ -26,7 +26,7 @@ The Gradle plugin automatically detects build metadata from your git repository.
 
 5. After an upload has successfully processed, confirm the metadata is correct in the Sentry UI
 
-   ![Upload metadata =400x](./images/android-metadata.png)
+   ![Upload metadata =400x](../size-analysis/images/android-metadata.png)
 
 ### Overriding Metadata