Updated Weaviate Docker image url (auto PR by bot) (#2659)

This minor change updates the URL of the [Weaviate Docker
image](https://weaviate.io/developers/weaviate/installation/docker-compose).

​Instead of the standard Docker registry, Weaviate now makes use of a
custom registry running at `cr.weaviate.io`.

Thanks in advance for ​merging.

🤖 beep boop, the Weaviate bot

PS:
Please note that the Weaviate Bot automates this PR; apologies if PR
formatting is missing. If you have questions, feel free to reach out via
our [forum](https://forum.weaviate.io) or
[Slack](https://weaviate.io/slack).

Co-authored-by: Matt Robinson <mrobinson@unstructured.io>

examples/weaviate/docker-compose.yml

@@ -1,7 +1,7 @@
 version: '3.4'
 services:
   weaviate:
-    image: semitechnologies/weaviate:1.19.6
+    image: cr.weaviate.io/semitechnologies/weaviate:1.19.6
     restart: on-failure:0
     ports:
      - "8080:8080"