[BUG]: BicepDeploy@0 requires a parameter file

### New issue checklist

- [x] I searched for [existing GitHub issues](https://github.com/microsoft/azure-pipelines-tasks/issues)
- [x] I read [pipeline troubleshooting guide](https://docs.microsoft.com/vsts/build-release/actions/troubleshooting)
- [x] I checked [how to collect logs](https://learn.microsoft.com/azure/devops/pipelines/troubleshooting/review-logs?view=azure-devops)

### Task name

BicepDeploy

### Task version

0.271.0

### Issue Description

I tried to use this task to deploy a Bicep file. This was purely for testing purposes and the Bicep used all hard-coded values and did not specify any parameters. Therefore, I omitted the `parametersFile` key from the task's inputs. However, the task failed with this error:

```
##[error]OperationFailed
##[error]Unsupported parameters file type: /home/vsts/work/1/s
```

### Environment type (Please select at least one enviroment where you face this issue)

- [ ] Self-Hosted
- [x] Microsoft Hosted
- [ ] VMSS Pool
- [ ] Container

### Azure DevOps Server type

dev.azure.com (formerly visualstudio.com)

### Azure DevOps Server Version (if applicable)

_No response_

### Operation system

Ubuntu-latest

### Relevant log output

```shell
n/a
```

### Full task logs with system.debug enabled

 [REPLACE THIS WITH YOUR INFORMATION] 

### Repro steps

```yml

```