Revert "chore: Update EnsurePorter function to specify version v1.2.1 for improved consistency in mixin installations."

This reverts commit 8057a44.

Signed-off-by: Kim Christensen <kmch@simcorp.com>

Author: kichristensen

mage/setup/mixins.go

@@ -37,5 +37,5 @@ func InstallMixins() error {
 }
 
 func EnsurePorter() {
-	porter.EnsurePorterAt("v1.2.1")
+	porter.EnsurePorter()
 }