Add hash tags to TS.CREATERULE examples

[LiorKogan]

Added hash tags to the examples

[github-actions]

Staging links:
https://redis.io/docs/staging/LiorKogan-patch-1/commands/ts.createrule/

[dwdougherty]

Thank you, @LiorKogan. I'm not sure I understand the reason for these changes, but I trust your judgement. Approved.

[LiorKogan]

@dwdougherty thank you.
The reason is the warning we have on this page:

Warning:
In a clustered environment, you must use hash tags to force sourceKey and destKey to be stored in the same hash slot. If you don't, Redis may fail to compact the data without displaying any error messages.