Update next light theme primary color to #07827E (#981)

* Update next theme primary color to #07827E

Signed-off-by: Matt Provost <provomat@amazon.com>

* Update changelog

Signed-off-by: Matt Provost <provomat@amazon.com>

---------

Signed-off-by: Matt Provost <provomat@amazon.com>
(cherry picked from commit 9760094)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

# Conflicts:
#	CHANGELOG.md

src/themes/oui-next/global_styling/variables/_colors.scss

@@ -17,7 +17,7 @@ $ouiColorGhost: #FCFEFF !default;
 $ouiColorInk: #0A121A !default;
 
 // Core
-$ouiColorPrimary: #159D8D !default;
+$ouiColorPrimary: #07827E !default;
 $ouiColorSecondary: #017D73 !default;
 $ouiColorAccent: #DD0A73 !default;