Fix command extending wrong base class

[caendesilva]

Fixes a mistake in #1450

[codecov]

Codecov Report

Merging #1453 (e2f9e8d) into master (01bc43f) will not change coverage.
The diff coverage is n/a.

❗ Current head e2f9e8d differs from pull request most recent head 451124b. Consider uploading reports for the commit 451124b to get more accurate results

@@              Coverage Diff              @@
##              master     #1453     +/-   ##
=============================================
  Coverage     100.00%   100.00%             
- Complexity      1728      3456   +1728     
=============================================
  Files            180       360    +180     
  Lines           4693      9386   +4693     
=============================================
+ Hits            4693      9386   +4693     

Files	Coverage Δ
...es/framework/src/Console/Commands/ServeCommand.php	100.00% <ø> (ø)

... and 180 files with indirect coverage changes