Update manifest to reflect changes in 30 day limit

Author: gnmyt

client/index.html

@@ -8,10 +8,10 @@
     <meta property="og:image" content="/api/opengraph/image" />
     <meta property="og:image:type" content="image/png" />
     <meta name="twitter:title" content="MySpeed" />
-    <meta name="twitter:description" content="A speed test analysis software that shows your internet speed for up to 30 days" />
+    <meta name="twitter:description" content="A speed test analysis software that shows your internet speed history over a configurable retention period" />
     <meta name="twitter:card" content="summary_large_image" />
     <meta name="twitter:image:src" content="/api/opengraph/image" />
-    <meta name="description" content="A speed test analysis software that shows your internet speed for up to 30 days" />
+    <meta name="description" content="A speed test analysis software that shows your internet speed history over a configurable retention period" />
     <link rel="apple-touch-icon" href="/assets/img/logo192.png" />
     <link rel="manifest" href="/manifest.json" />
     <title>MySpeed</title>

client/public/manifest.json

@@ -1,7 +1,7 @@
 {
   "short_name": "MySpeed",
   "name": "MySpeed - Speedtests",
-  "description": "A speed test analysis software that shows your internet speed for up to 30 days",
+  "description": "A speed test analysis software that shows your internet speed history over a configurable retention period",
   "icons": [
     {
       "src": "/assets/img/favicon.ico",