chore(README.md): add warning

README.md

@@ -1,3 +1,15 @@
+## THIS AIN'T FOR YA!
+
+This is a fork of the unmaintained piece of sh- software that is
+[redis-om-python](https://github.com/redis/redis-om-python) with updated
+packages (namely, pydantic v2 and python-ulid v2) for my needs.
+
+Feel free to use this, but keep in mind that I probably won't update it once
+redis' engineers get their shit together and start maintaining their repo
+again. (wdym, 130 open issues?)
+
+---
+
 <div align="center">
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