opensearch: Cargo -> crates.io (#9860)

Author: ryuapp

app/index.html

@@ -19,7 +19,7 @@
     {{content-for 'head-footer'}}
     <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon">
     <link rel="icon" href="/assets/cargo.png" type="image/png">
-    <link rel="search" href="/opensearch.xml" type="application/opensearchdescription+xml" title="Cargo">
+    <link rel="search" href="/opensearch.xml" type="application/opensearchdescription+xml" title="crates.io">
 
     <meta name="google" content="notranslate" />