Printing style for current page

Changing the blue back to the brand colour `#1d70b8` when printing.  The colour `#1d8feb` is presumably to contrast against the black `#0b0c0c` header, but when printing the header is white, so it makes sense to use a darker blue which contrasts better against white.

Linting tests changes

Removed trailing spaces and added blank line as per linting test errors

Linting tests changes

Removed blank line as per linting test errors (yep - the same one that the linter told me to add)

Remove whitespace

Update changelog with link to PR

undid mistake

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixes
 
 - [#2998: Refactor back link and breadcrumb chevrons to use ems](https://github.com/alphagov/govuk-frontend/pull/2998)
+- [#3021 Printing style for current page link in header](https://github.com/alphagov/govuk-frontend/pull/3021) - thanks to [Malcolm Butler](https://github.com/MalcolmVonMoJ) for the contribution
 
 ## 4.4.0 (Feature release)
 

src/govuk/components/header/_index.scss

@@ -281,6 +281,12 @@
         color: $govuk-header-link-active;
       }
 
+      // When printing, use the normal blue as this contrasts better with the
+      // white printing header
+      @include govuk-media-query($media-type: print) {
+        color: $govuk-brand-colour;
+      }
+
       // When focussed, the text colour needs to be darker to ensure that colour
       // contrast is still acceptable
       &:focus {