demo: commit cached collocation analysis (sockenpuppe_aca.rds) to speed up CI build

Change-Id: Ia53b01f0e17e4c08ae25714d6029d7e3043c069e
diff --git a/examples/sockenpuppe_aca.rds b/examples/sockenpuppe_aca.rds
new file mode 100644
index 0000000..7e434fe
--- /dev/null
+++ b/examples/sockenpuppe_aca.rds
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