Tweak some block styles (#7033)

course/theme.json

@@ -674,13 +674,13 @@
 			},
 			"sensei-lms/course-theme-course-progress-bar": {
 				"color": {
-					"background": "#ffffff"
+					"background": "#F8F5F3"
 				}
 			},
 			"sensei-lms/course-theme-course-progress-counter" : {
 				"typography": {
 					"fontFamily": "var(--wp--preset--font-family--system)",
-					"fontSize": "clamp(0.875rem, 0.696rem + 0.476vw, 1.125rem)",
+					"fontSize": "var(--wp--preset--font-size--x-small)",
 					"letterSpacing": "0.02em",
 					"lineHeight": "1"
 				}