chore: Improve version check test

Signed-off-by: Drew Robinson <[email protected]>

tests/flags.bats

@@ -3,7 +3,7 @@
 @test "get the version of ahoy with --version" {
  run ./ahoy -f testdata/simple.ahoy.yml --version
  [ $status -eq 0 ]
- [ $(expr "$output" : "[0-9.]\.[0-9.]\.[0-9.]") -ne 0 ]
+ [ $(expr "$output" : "^v?[0-9.]\.[0-9.]\.[0-9.](\S*)?") -eq 0 ]
 }
 
 @test "get help instead of running a command with --help" {