mise tasks deps <taskname> does not work if provided task name without extension

[hverlin]

If I have a file task name mise-tasks/build.sh and I call mise tasks deps build it will fail.

root@166cea5083f1:~/prj# ls mise-tasks/
build.sh
root@166cea5083f1:~/prj# mise t
Name   Description
build
root@166cea5083f1:~/prj# mise t deps build
mise ERROR no tasks named `build` found. Available tasks: build.sh

I believe it should accept it since it's difficult to automate calling mise t deps <taskname> from the output of mise tasks otherwise?

[hverlin]

#3997