fix: add missing fill=currentColor for basic circles

[MarkusWendorf]

Hi, I noticed that when changing the color of the svg element some circles do not change the color accordingly, while the rest of the svg behaves correctly.

I updated all bare <circle> elements to include fill="currentColor" with

find . -type f -name '*.svg' -exec sed -i '' -E 's/(\<circle cx="[^"]+" cy="[^"]+" r="[^"]+")\/>/\1 fill="currentColor" \/>/g' {} +

[MarkusWendorf]

@rektdeckard any thoughts on this? thank you

Edit: There are some icons where my method did not work, would have to go through all of them to see where it broke.