fix: updated the block with correct theme

Author: ranimandepudi

content/learning-paths/servers-and-cloud-computing/gke-multi-arch-axion/multi-arch-images.md

@@ -65,13 +65,14 @@ ENTRYPOINT ["python","email_server.py"]
 EOF
 ```
 
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+**What these edits do**
+
 - **BuildKit syntax** unlocks `--mount=type=cache` to speed rebuilds.
 - **TARGETPLATFORM** lets Buildx set linux/amd64 vs linux/arm64 explicitly.
 - **Dev vs runtime packages:** build stage compiles native wheels; final stage keeps only needed shared libs.
 - **`--prefer-binary`** avoids source builds when wheels exist (more reliable across arches).
 - **Removed extra `apk update`** since `apk add --no-cache` already avoids stale indexes & caches.
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+
 
 #### Apply equivalent updates to the other three services