Update bug report issue template

[mdanish-kh]

• [x] Have you signed the Contributor License Agreement?

• [ ] Are you working against an Issue?

• Update issue template to auto-apply Issue-Bug label for bug reports

• Add placeholder text to get wingetcreate version in Environment section

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Microsoft Reviewers: codeflow:open?pullrequest=https://github.com/microsoft/winget-create/pull/401&drop=dogfoodAlpha

[ryfu-msft]

/azp run

[azure-pipelines[bot]]

Azure Pipelines could not run because the pipeline triggers exclude this branch/path.