Update blog links on /data/spark (#1095)

templates/data/spark.html

@@ -233,8 +233,8 @@ <h2>Apache Spark<sup>&reg;</sup> resources</h2>
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-        <h3 class="p-heading--5"><a href="https://ubuntu.com/blog/charmed-spark-beta-release">Charmed Spark beta release is out &ndash; try it today</a></h3>
-        <p>Try Canonical's Apache Spark® distribution and share your feedback.</p>
+        <h3 class="p-heading--5"><a href="/blog/canonical-releases-charmed-spark">Canonical announces supported solution for Apache Spark&reg; on Kubernetes</a></h3>
+        <p>Canonical announces Charmed Spark &dash; an advanced solution for Apache Spark&reg; that provides everything users need to run Apache Spark on Kubernetes.</p>
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@@ -243,7 +243,7 @@ <h3 class="p-heading--5"><a href="https://ubuntu.com/engage/spark-reference-arch
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-        <h3 class="p-heading--5"><a href="https://ubuntu.com/engage/Spark-Security-Webinar">Securing Apache Spark Big Data Operations</a></h3>
+        <h3 class="p-heading--5"><a href="https://ubuntu.com/engage/spark-security-webinar">Securing Apache Spark Big Data Operations</a></h3>
         <p>Learn about big data security best practices and  pragmatic steps that you can take to secure your Spark applications &ndash; wherever they may be running.</p>
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