Reset DepthStencilState to None before Skybox.Draw

[Saplonily]

Skybox.Draw doesn't reset DepthStencilState to None. Some mods may begin a new SpriteBatch with DepthStencilState set to Default(such as CelesteTAS), which causes the Skybox to be rendered in front of the mountain.
This pr resets DepthStencilState to None before Skybox.Draw.
Special thanks to @Qingfeng-UwU for identifying this issue.

[microlith57]

looks good!

[DashingCat]

Disclaimer: I could not reproduce the issue on my end, so I could not check if the changes actually fixes the issue; however the mountain and skybox render correctly with this change.
Edit: I was able to reproduce the issue, and confirms the change fixes the issue.

I approve with minor nitpicks left in comments.

[Saplonily]

Disclaimer: I could not reproduce the issue on my end, so I could not check if the changes actually fixes the issue; however the mountain and skybox render correctly with this change.

I approve with minor nitpicks left in comments.

I'm on Everest 0e2f7db9 - (dev) Merge pull request #1075 from DashingCat/patch-1, CelesteTAS v3.47.0 and StrawberryJam2021 v1.0.12, and reproduced it by watching SJ's mountains 🤔

[DashingCat]

I'm on Everest 0e2f7db9 - (dev) Merge pull request #1075 from DashingCat/patch-1, CelesteTAS v3.47.0 and StrawberryJam2021 v1.0.12, and reproduced it by watching SJ's mountains 🤔

Sorry, I must have made a mistake when testing previously, I was able to reproduce the issue, and confirm the PR fixes it.

[maddie480-bot]

The pull request was approved and entered the 3-day last-call window. Since no PR should be merged within 3 days of the next rolling release, the last-call window is extended further.
If no further reviews happen, it will end on Mar 8, 2026, 12:00 AM UTC, after which the pull request will be able to be merged.

[maddie480-bot]

The last-call window for this pull request ended. It can now be merged if no blockers were brought up.