Fix gofmt alignment in HostedRunnerImageDetail struct literals

[Copilot]

The gci linter was failing with "File is not properly formatted" due to incorrect struct field alignment in the hosted runner test files.

Changes

• github/actions_hosted_runners_test.go / github/enterprise_actions_hosted_runners_test.go: Corrected ID field spacing in HostedRunnerImageDetail literals — gofmt requires alignment relative to the longest field name in the block (Size), not the longest across the enclosing struct.

// Before (extra spaces, fails gofmt)
Image: &HostedRunnerImageDetail{
    ID:     Ptr("ubuntu-20.04"),
    Size: Ptr(int64(86)),
},

// After
Image: &HostedRunnerImageDetail{
    ID:   Ptr("ubuntu-20.04"),
    Size: Ptr(int64(86)),
},

Fix applied in 4 locations across both files via gofmt -w.

Original prompt

The linter workflow is failing on the fix-hosted-runner-image-json-tag branch with "Linting: issues found in 1 module directories." Please run the Go linter (golangci-lint or equivalent configured in this repo), identify and fix all linting issues in the code changes on this branch. The generated files are up to date, so the issue is purely linting errors in the Go source code.

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