Update PostCSS, postcss-header, and postcss-preset-env

There was a release for postcss-header yesterday. It's a patch release so not a big deal.

Needs a re-roll anyway.

updated yarn upgrade postcss postcss-header postcss-preset-env

umm not sure how to solve the problem in 9.5 properly, there are other dependencies that would be better to update in 9.5 instead of those. so let's just not update that 9.5 ?

+++ b/core/themes/olivero/css/components/text-content.css
@@ -42,7 +42,6 @@
-  -webkit-text-decoration-color: currentColor;
@@ -62,7 +61,6 @@
-    -webkit-text-decoration-color: var(--color--primary-80);

These are the only lines that are in addition to the yarn upgrade postcss postcss-header postcss-preset-env command, and according to https://developer.mozilla.org/en-US/docs/Web/CSS/text-decoration-color, these haven't been necessary since Safari 12.2.

Given that there are other 9.5 dependencies that are preventing upgrading postcss, I think we could investigate what, if anything, we want to update for 9.5 in a follow-up.

Therefore, RTBC for the Drupal 10 patch.

Got a 9.5.x patch working

Committed 7143315 and pushed to 10.1.x and cherry-picked to 10.0.x. Thanks!

Leaving open against 9.5.x.

diff --git a/core/themes/olivero/css/components/tabs.css b/core/themes/olivero/css/components/tabs.css
index 0ac9a61b2b..ce656af52d 100644
--- a/core/themes/olivero/css/components/tabs.css
+++ b/core/themes/olivero/css/components/tabs.css
@@ -3,8 +3,7 @@
  * See the following change record for more information,
  * https://www.drupal.org/node/3084859
  * @preserve
- */
-[dir="ltr"] .tabs {
+ */[dir="ltr"] .tabs {
   margin-left: 0;
 }

This looks a bit odd in the 9.5 patch?

It does look odd but I'm not particularly concerned about that because the comment ends before the ruleset, and it's in the generated CSS.

Committed/pushed to 10.1.x/10.0.x/9.5.x respectively thanks!