no version number "go install" procedure

**Describe the bug**
latest LazyGit version is v0.41.0 but this number doesn't show with `lazygit --version` if the (latest) package is installed by `go install`.
this also wrongly triggers the internal update manager.

**To Reproduce**

```bash
# install lazygit via "go install"
go install github.com/jesseduffield/lazygit@latest
# check the installed version
lazygit --version
```
the output is:
`commit=, build date=, build source=unknown, version=unversioned, os=linux, arch=amd64, git version=2.34.1`
which has no information about the version number

**Expected behavior**
`version=0.41.0` in the output of the above commands