Panic when loading branches on windows

**Describe the bug**
Panic occurs when loading branches:
panic: '%' is not recognized as an internal or external command, operable program or batch file.

goroutine 39 [running]:
github.com/jesseduffield/lazygit/pkg/commands.(*BranchListBuilder).obtainBranches(0xc00039bef0, 0x1367340, 0x10000, 0x0)
/home/runner/work/lazygit/lazygit/pkg/commands/loading_branches.go:43 +0x693
github.com/jesseduffield/lazygit/pkg/commands.(*BranchListBuilder).Build(0xc0000dbef0, 0x11315f7, 0xc0000a4690, 0x1326e87)
/home/runner/work/lazygit/lazygit/pkg/commands/loading_branches.go:103 +0x52
github.com/jesseduffield/lazygit/pkg/gui.(*Gui).refreshBranches(0xc0000b8000)
/home/runner/work/lazygit/lazygit/pkg/gui/branches_panel.go:69 +0xc6
github.com/jesseduffield/lazygit/pkg/gui.(*Gui).refreshReflogCommitsConsideringStartup.func1()
/home/runner/work/lazygit/lazygit/pkg/gui/commits_panel.go:69 +0x45
github.com/jesseduffield/lazygit/pkg/utils.Safe.func1(0xb35af5, 0xc000055da0)
/home/runner/work/lazygit/lazygit/pkg/utils/utils.go:95 +0x2b
github.com/jesseduffield/lazygit/pkg/utils.SafeWithError(0xc00039bfb8, 0x0, 0x0)
/home/runner/work/lazygit/lazygit/pkg/utils/utils.go:106 +0x67
github.com/jesseduffield/lazygit/pkg/utils.Safe(0xc00008aa40)
/home/runner/work/lazygit/lazygit/pkg/utils/utils.go:95 +0x50
created by github.com/jesseduffield/lazygit/pkg/gui.(*Gui).refreshReflogCommitsConsideringStartup
/home/runner/work/lazygit/lazygit/pkg/gui/commits_panel.go:67 +0xa9

**To Reproduce**
Open lazygit in Windows 10 Pro-64 bit (Version 10.0.19043.1387), cmd or ConEmu

**Expected behavior**
no panic

**Desktop (please complete the following information):**
- OS: Windows
- Lazygit Version: presumably latest

**Additional context**
I suspect we just need to escape those quote symbols so that windows doesn't think it's dealing with a new command. Interesting that this isn't caught by our windows integration tests given that whenever we open lazygit, the branches load.