Changed Array to Seq in MuxLookup explantation (#3547) (#3550)

(cherry picked from commit 1ae807a)

Co-authored-by: Mads Rumle Nordstrøm <85681203+madsrumlenordstrom@users.noreply.github.com>

Author: mergify[bot]

docs/src/explanations/muxes-and-input-selection.md

@@ -34,7 +34,7 @@ array [ condition -> selected_input_port ].
 Chisel also provides `MuxLookup` which is an n-way indexed multiplexer:
 
 ```scala
-MuxLookup(idx, default)(Array(0.U -> a, 1.U -> b, ...))
+MuxLookup(idx, default)(Seq(0.U -> a, 1.U -> b, ...))
 ```
 
 This is the same as a `MuxCase`, where the conditions are all index based selection: