Fixed typo in bitmaps page (#2452)

Fixed erroneous reference to "server" that should be "sensor".

docs/data-types/bitmaps.md

@@ -32,7 +32,7 @@ You can represent this scenario using a bitmap whose key references the current
 1
 ```
 
-* What about server 456?
+* What about sensor 456?
 ```
 > GETBIT pings:2024-01-01-00:00 456
 0
@@ -54,4 +54,4 @@ See the [complete list of bitmap commands](https://redis.io/commands/?group=bitm
 ## Learn more
 
 * [Redis Bitmaps Explained](https://www.youtube.com/watch?v=oj8LdJQjhJo) teaches you how to use bitmaps for map exploration in an online game. 
-* [Redis University's RU101](https://university.redis.com/courses/ru101/) covers Redis bitmaps in detail.
+* [Redis University's RU101](https://university.redis.com/courses/ru101/) covers Redis bitmaps in detail.