fix(versioned): Consitently use .into() in enum variant From impls

Author: Techassi

crates/stackable-versioned-macros/src/codegen/item/variant.rs

@@ -164,7 +164,7 @@ impl VersionedVariant {
                             }),
                             Direction::Downgrade => Some(quote! {
                                 #next_version_ident::#enum_ident::#next_variant_ident #from_fields
-                                    => #old_version_ident::#enum_ident::#old_variant_ident #from_fields,
+                                    => #old_version_ident::#enum_ident::#old_variant_ident #for_fields,
                             }),
                         }
                     }

crates/stackable-versioned-macros/tests/inputs/pass/enum_fields.rs

@@ -4,11 +4,18 @@ use stackable_versioned::versioned;
 // ---
 pub mod versioned {
     enum Foo {
-        A { aa: usize, aaa: u64 },
-        B { bb: bool },
+        #[versioned(changed(since = "v1alpha2", from_name = "PrevA"))]
+        A {
+            aa: usize,
+            aaa: u64,
+        },
+        B {
+            bb: bool,
+        },
     }
 
     enum Bar {
+        #[versioned(changed(since = "v1alpha2", from_name = "PrevA"))]
         A(A),
         B {},
     }