setServiceOptions: %f format produces invalid autoscaling annotation values with trailing zeros

## Description
`setServiceOptions` in `pkg/knative/deployer.go` uses `fmt.Sprintf("%f", ...)` to format the `Target` and `Utilization` autoscaling annotation values. Go's `%f` verb produces 6 trailing decimal places by default (e.g., `"100.000000"`), which is not the expected format for Knative autoscaling annotations.

## Steps to Reproduce
1. Create a function with scale options in `func.yaml`:
```yaml
deploy:
options:
scale:
target: 100
utilization: 70
```
2. Deploy the function: `func deploy`
3. Inspect the deployed Knative Service annotations:
```bash
kubectl get ksvc -o jsonpath='{.spec.template.metadata.annotations}'
```

## Expected Behavior
Annotations should contain clean numeric strings:
- `autoscaling.knative.dev/target: "100"`
- `autoscaling.knative.dev/target-utilization-percentage: "70"`

## Actual Behavior
Annotations contain float-formatted strings with trailing zeros:
- `autoscaling.knative.dev/target: "100.000000"`
- `autoscaling.knative.dev/target-utilization-percentage: "70.000000"`

## Relevant Code
```go
// pkg/knative/deployer.go:592
toUpdate[autoscaling.TargetAnnotationKey] = fmt.Sprintf("%f", *options.Scale.Target)
// pkg/knative/deployer.go:598
toUpdate[autoscaling.TargetUtilizationPercentageKey] = fmt.Sprintf("%f", *options.Scale.Utilization)
```

## Suggested Fix
Replace `%f` with `%g` to strip trailing zeros:
```go
toUpdate[autoscaling.TargetAnnotationKey] = fmt.Sprintf("%g", *options.Scale.Target)
toUpdate[autoscaling.TargetUtilizationPercentageKey] = fmt.Sprintf("%g", *options.Scale.Utilization)
```

Start in pkg/knative/deployer.go around lines 592 and 598, where setServiceOptions formats the scale annotations. Check the generated values using the func.yaml scale options and kubectl command from the report; done means the target and utilization annotations contain clean numeric strings without trailing zeros.

Written by the indexing model from the issue text.