Update Docker image reference in README

Author: jimboid

README.md

@@ -18,7 +18,7 @@ https://github.com/CCPBioSim/pca-workshop
 In our containers we are using the JupyterHub default port 8888, so you should
 forward this port when deploying locally::
 
-    docker run -p 8888:8888 ghcr.io/jimboid/biosim-pca-workshop:latest
+    docker run -p 8888:8888 ghcr.io/ccpbiosim/pca-workshop:latest
 
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