More renaming

.github/CODEOWNERS

@@ -1,2 +1,2 @@
 # Automatically request reviews from the synapse-core team when a pull request comes in.
-* @matrix-org/synapse-core
+* @element-hq/synapse-core

.github/workflows/docker.yml

@@ -58,7 +58,7 @@ jobs:
         with:
           images: |
             docker.io/matrixdotorg/synapse
-            ghcr.io/matrix-org/synapse
+            ghcr.io/element-hq/synapse
           flavor: |
             latest=false
           tags: |