build(examples): update target res for heatmap PNG

Author: postspectacular

examples/commit-heatmap/package.json

@@ -9,7 +9,7 @@
 	"type": "module",
 	"scripts": {
 		"build": "bun build --target node --outfile=index.js src/index.ts && node index.js",
-		"build:png": "yarn build && rsvg-convert -w 2560 -a -o heatmap.png heatmap.svg"
+		"build:png": "yarn build && rsvg-convert -w 8192 -a -o heatmap.png heatmap.svg"
 	},
 	"dependencies": {
 		"@thi.ng/api": "workspace:^",