Fix javadoc issue in Java 13
diff --git a/src/main/javadoc/overview.html b/src/main/javadoc/overview.html
index a52cbdc..f220cc6 100644
--- a/src/main/javadoc/overview.html
+++ b/src/main/javadoc/overview.html
@@ -23,8 +23,8 @@
<head>
</head>
<body>
-<h2>Sketching Core Library</h2>
-<h3>Overview</h3>
+<h1>Sketching Core Library</h1>
+<h2>Overview</h2>
<p>The Sketching Core Library provides a range of stochastic streaming algorithms and closely
related java technologies that are particularly useful when integrating this technology into
@@ -41,7 +41,7 @@
<li><b><a href="https://datasketches.apache.org/api/java/snapshot/apidocs/org/apache/datasketches/fdt/package-summary.html">FDT - Frequent Distinct Tuples</a></b>
</li>
-<li><b><a href="https://datasketches.apache.org/api/java/snapshot/apidocs/org/apache/datasketches/frequencies/package-summary.html">Frequencies Fequent Items- </a></b>
+<li><b><a href="https://datasketches.apache.org/api/java/snapshot/apidocs/org/apache/datasketches/frequencies/package-summary.html">Frequencies Frequent Items- </a></b>
</li>
<li><b><a href="https://datasketches.apache.org/api/java/snapshot/apidocs/org/apache/datasketches/hash/package-summary.html">Hash - Common Hash Functions</a></b>
