favicon, add new versions and update the older ones.

static/site.webmanifest

@@ -1,6 +1,6 @@
 {
-  "name": "Hyperling's Musings",
-  "short_name": "HyperMusings",
+  "name": "Hyperling's Blog",
+  "short_name": "Blog",
   "icons": [
     {
       "src": "/web-app-manifest-192x192.png",
@@ -15,7 +15,7 @@
       "purpose": "maskable"
     }
   ],
-  "theme_color": "#cccccc",
-  "background_color": "#cccccc",
+  "theme_color": "#ffffff",
+  "background_color": "#ffffff",
   "display": "standalone"
 }