chore: Only use the Famedly Synapse repo for testing

Author: jason-famedly

.github/workflows/ci.yaml

@@ -36,7 +36,7 @@ jobs:
       matrix:
         include:
           - homeserver: Synapse
-            repo: element-hq/synapse
+            repo: famedly/synapse
             tags: synapse_blacklist
             packages: ./tests/msc3874 ./tests/msc3902 ./tests/msc4306
             env: "COMPLEMENT_ENABLE_DIRTY_RUNS=1 COMPLEMENT_SHARE_ENV_PREFIX=PASS_ PASS_SYNAPSE_COMPLEMENT_DATABASE=sqlite"