fix exec

.woodpecker/build.yaml

@@ -12,10 +12,10 @@ steps:
       event: [push]
     image: ${image}
     commands:
-      - subst -r 's/2025/foobar/' t/file*
+      - perl subst -r 's/2025/foobar/' t/file*
       - grep foobar t/file*
       - cp t/file1 t/huh.1
       - cp t/file1 t/mor.2
-      - subst -m 's/(huh|mor)/sub/g' '/.\d$/'
+      - perl subst -m 's/(huh|mor)/sub/g' '/.\d$/'
       - ls -l t/sub.1
       - ls -l t/sub.2