fix: convert CMYK branding color to RGB

Fixes incompatability with PDF/A format

src/branding.typ

@@ -3,16 +3,16 @@
 //  https://brand.abb/portal/en/branding-principles/basic-brand-elements/color
 
 // ABB branding colors
-#let ABB-RED = cmyk(0%, 100%, 95%, 0%)
-#let ABB-BLACK = cmyk(0%, 0%, 0%, 100%)
-#let ABB-GRAY-01 = cmyk(0%, 0%, 0%, 90%)
-#let ABB-GRAY-02 = cmyk(0%, 0%, 0%, 75%)
-#let ABB-GRAY-03 = cmyk(0%, 0%, 0%, 55%)
-#let ABB-GRAY-04 = cmyk(0%, 0%, 0%, 35%)
-#let ABB-GRAY-05 = cmyk(0%, 0%, 0%, 15%)
-#let ABB-GRAY-06 = cmyk(0%, 0%, 0%, 5%)
-#let ABB-WHITE = cmyk(0%, 0%, 0%, 0%)
+#let ABB-RED = rgb(255, 0, 13)
+#let ABB-BLACK = rgb(0, 0, 0)
+#let ABB-GRAY-01 = rgb(25, 25, 25)
+#let ABB-GRAY-02 = rgb(64, 64, 64)
+#let ABB-GRAY-03 = rgb(115, 115, 115)
+#let ABB-GRAY-04 = rgb(166, 166, 166)
+#let ABB-GRAY-05 = rgb(217, 217, 217)
+#let ABB-GRAY-06 = rgb(242, 242, 242)
+#let ABB-WHITE = rgb(255, 255, 255)
 // ABB branding functinal colors
-#let ABB-BLUE = cmyk(100%, 53%, 2%, 16%)
-#let ABB-GREEN = cmyk(91%, 4%, 100%, 25%)
-#let ABB-YELLOW = cmyk(0%, 9%, 100%, 0%)
+#let ABB-BLUE = rgb(0, 101, 210)
+#let ABB-GREEN = rgb(17, 184, 0)
+#let ABB-YELLOW = rgb(255, 232, 0)