Twenty Seventeen: Resolves calendar block header cells not centering.

The calendar header block cells were not centered. This resolves that both in front and back.

Props nkeller15, sabernhardt, shailu25.
Fixes #58547.

Built from https://develop.svn.wordpress.org/trunk@58461


git-svn-id: http://core.svn.wordpress.org/trunk@57910 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentyseventeen/assets/css/blocks.css

@@ -196,6 +196,12 @@ p.has-drop-cap:not(:focus)::first-letter {
 	text-align: right;
 }
 
+/* Calendar */
+
+.wp-block-calendar th {
+	text-align: center;
+}
+
 /*--------------------------------------------------------------
 4.0 Blocks - Layout Elements
 --------------------------------------------------------------*/

wp-content/themes/twentyseventeen/assets/css/editor-blocks.css

@@ -709,6 +709,12 @@ table.wp-block-table td:last-child {
 	text-align: right;
 }
 
+/* Calendar */
+
+.editor-styles-wrapper .wp-block-calendar th {
+	text-align: center;
+}
+
 /* Verse */
 
 .editor-styles-wrapper .wp-block-verse {

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.6-beta3-58460';
+$wp_version = '6.6-beta3-58461';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.