skaffold ko builder does not detect changes to go:embed files

### Expected behavior

Making a change to a file embedded by the [`embed` package](https://pkg.go.dev/embed) should cause skaffold to produce a new image.

### Actual behavior

`skaffold build` instead logs:

```
Checking cache...
- app: Found remotely
```

and no new image is produced.

### Information

- Skaffold version: 1.39.2
- Operating system: macOS & Linux
- Installed via: Homebrew
- Contents of skaffold.yaml:

```yaml
apiVersion: skaffold/v2beta28
kind: Config
build:
artifacts:
- image: app
ko:
dir: .
main: ./app/cmd
env:
- CGO_ENABLED=0
flags:
- -buildvcs=false
- -trimpath
- -v
ldflags:
- -buildid=
- -extldflags="static"
- -s
- -w
```

### Steps to reproduce the behavior

1. clone https://github.com/jsok/skaffold-ko-embed-bug
2. Run a local registry: `go run github.com/google/go-containerregistry/cmd/registry@latest -port 1338`
3. `skaffold build -d localhost:1338`
```
Generating tags...
- app -> localhost:1338/app:latest
Some taggers failed. Rerun with -vdebug for errors.
Checking cache...
- app: Not found. Building
Starting build...
Building [app]...
No matching credentials were found, falling back on anonymous
Using base gcr.io/distroless/static:nonroot@sha256:1f580b0a1922c3e54ae15b0758b5747b260bd99d39d40c2edb3e7f6e2452298b for github.com/jsok/skaffold-ko-embed-bug
Using build config app for github.com/jsok/skaffold-ko-embed-bug
Building github.com/jsok/skaffold-ko-embed-bug for linux/amd64
Publishing localhost:1338/app:latest
Published localhost:1338/app@sha256:b772b3a87a43fb1c2708ee9651ce345776ea80fab364972b15a412d87e36f646
Build [app] succeeded
```
4. Make an edit to `hello.txt` (the embedded file)
5. `skaffold build -d localhost:1338`
```
Generating tags...
- app -> localhost:1338/app:latest
Some taggers failed. Rerun with -vdebug for errors.
Checking cache...
- app: Found Remotely
```

#### Fixes considered

Adding dependencies to the `skaffold.yaml` like:
```
- image: app
ko:
dependencies:
paths:
- '**/*.go'
- hello.txt
```

Does fix the problem, but this is tedious to maintain for larger projects.

`ko` natively does not exhibit this behaviour, it picks up embedded file changes and produces new images correctly.