Fix Brave Logo usages in widgets in dark mode

[kylehickinson]

Description:

The top news list widgets and top news lock screen widget use an inversed monochrome brave logo which is the wrong usage of the logo

[hffvld]

Verified on iPhone 14 using version(s):

Device/OS: iPhone 14 / iOS 17.2
Brave build: 1.61 (23.12.7.20)
BraveCore: 1.61.101 (120.0.6099.71)

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Fresh install

**STEPS:** 1. Fresh install Brave 2. Go to the device home screen > Add shortcut 3. Add Brave News shortcuts > Verify **ACTUAL RESULTS:** - Verified that `Brave logo` has proper color on all widgets - Verified the same in the `Light` and `Dark` mode --------------------------- |Light Mode|Dark Mode| |:-:|:-:| |  |  | |  |  |

Upgrade install

**STEPS:** 1. Install Brave `1.60` 2. Go to the device home screen > Add shortcut 3. Add Brave News shortcuts > Observe the issue with the `News` widget 4. Upgrade Brave to `1.61` build > Verify **ACTUAL RESULTS:** - Verified that `Brave logo` has proper color on all widgets - Verified the same in the `Light` and `Dark` mode --------------------------- |Light Mode `1.60`|Light Mode `1.61`|Dark Mode `1.60`|Dark Mode `1.61`| |:-:|:-:|:-:|:-:| |  |  |  |  | |  |  |  |  |