Add a little more space between slide title and accent rule in PPTX.

Increase the gap below heading text before the blue underline on content slides.

Author: dschloe

scripts/lib/fill_pptx_genjs.mjs

@@ -151,7 +151,7 @@ function addTitleBlock(s, pptx, slide, theme) {
   });
 
   if (!theme.titleBar) {
-    const barY = titleY + titleH + 0.04;
+    const barY = titleY + titleH + 0.10;
     s.addShape(pptx.ShapeType.rect, {
       x: 0.5,
       y: barY,