Does not display change log of submodule with delta as custom pager

**Describe the bug**
I set delta as the pager, with following config, it will not display log of submodule
```yml
gui:
theme:
selectedLineBgColor:
- reverse
git:
paging:
colorArg: always
pager: delta --dark --paging=never
```
If I change the config to
```yml
gui:
theme:
selectedLineBgColor:
- reverse
git:
paging:
colorArg: always
pager: diff-so-fancy
```
It will display log of submodule correctly.

A clear and concise description of what the bug is.

**To Reproduce**
1. set config `pager: delta --dark --paging=never`
2. open a git repo with submodule

**Expected behavior**
Display submodule history when submodule changes

**Screenshots**
with diff-so-fancy as custom pager, or use default pager
with delta as custom pager

**Desktop (please complete the following information):**
- OS: Ubuntu 18.04
- Lazygit Version: 0.32
- The last commit id if you built project from sources (run : ```git rev-parse HEAD```)

**Additional context**
lazygit from ubuntu ppa
`commit=4744b39f038d9e197455dc81a55277e1b1fe0586, build date=2022-01-13T22:01:27Z, build source=binaryRelease, version=0.32, os=linux, arch=amd64`
delta version 0.4.3