Uptime-Kuma 2.1.0 inverted color on heatbeats

[systemofapwne]

Describe the bug
The color of the heartbeat monitor in latest uptime-kuma 2.1.0 is inverted: Up became pinkish/red and down became greenish.

Here you see some monitors that are all up, yet show red heatbeat.

Theme Install Method (Don't skip)

• Webserver subfilter Config

Application Info (Don't skip)

• Branch: Develop
• Version: Latest

To Reproduce
Enable an arbitrary skin on uptime kuma 2.1.0. The heartbeat monitor will have inverted colors

Expected behavior
Having green = up, red = down like in this screenshot

Additional context
Uptime kuma 2.1.0 changed many divs to canvas like here: louislam/uptime-kuma@3f944de

The invert statement in themepark now causes the issue:

theme.park/css/base/uptime-kuma/uptime-kuma-base.css

Lines 161 to 163 in 5c80670

	canvas {
	filter: invert(1)
	}

Disabling the invert fixes the problem for me, but this could have unknown side effects: It must have been there for a reason that I do not know, hence, I did not file a PR but a report instead.

[TankObliterator]

Same issue here. Applied the fix noted above and haven't seen anything strange yet.