typo: coherent InterPlanetary spelling

Author: hacdias

src/_includes/header.html

@@ -2,7 +2,7 @@
 
 <nav>
   <div>
-    <img src="/img/ipfs-standards.svg" alt="Interplanetary Standards Logo" width="25" height="25" class="logo">
+    <img src="/img/ipfs-standards.svg" alt="InterPlanetary Standards Logo" width="25" height="25" class="logo">
     <a href="/">IPFS Standards</a>
   </div>
 </nav>

src/index.html

@@ -6,7 +6,7 @@
 
 <header>
   <div>
-    <img src="/img/ipfs-standards.svg" alt="Interplanetary Standards Logo" width="60" height="60" class="logo">
+    <img src="/img/ipfs-standards.svg" alt="InterPlanetary Standards Logo" width="60" height="60" class="logo">
     <h1>IPFS Standards</h1>
     <p>
       The purpose of <em>IPFS Standards</em> is to foster interoperability between independent implementations of
@@ -16,7 +16,7 @@ <h1>IPFS Standards</h1>
 </header>
 
 <main>
-  <h2 class="pitch-title">Specifying IPFS and the Interplanetary stack.</h2>
+  <h2 class="pitch-title">Specifying IPFS and the InterPlanetary stack.</h2>
   <p class="pitch-subtitle">
     The technology that powers the content-addressable web is being standardized here.
   </p>