Description:
Using go-version: 1.20 breaks the build, as it uses Go 1.2 instead of 1.20

Action version:
v3 and v4

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Tools version:
1.20

Repro steps:

• Create Go project with go.mod in it, with proper module name (in my case: github.com/metalim/gotest)
• Add test file that imports that module
• Confirm that go test ./... passes locally
• Setup GH action with Go template
• Change go-version for setup-go from 1.19 to 1.20
• Observe build failing. Example: https://github.com/metalim/gotest/actions

Expected behavior:
Should use Go 1.20 or 1.20.4

Actual behavior:
Uses Go 1.2