Update word count in metadata

src/epub/content.opf

@@ -52,7 +52,7 @@
 		<dc:source>https://archive.org/details/dli.ernet.449370</dc:source>
 		<meta property="se:production-notes">This ebook corresponds to Part II of Project Gutenberg's “The Moon-Voyage,” which includes both “From the Earth to the Moon” and its sequel “Round the Moon.”</meta>
 		<meta property="se:word-count">55348</meta>
-		<meta property="se:reading-ease.flesch">63.49</meta>
+		<meta property="se:reading-ease.flesch">63.59</meta>
 		<meta property="se:url.encyclopedia.wikipedia">https://en.wikipedia.org/wiki/Round_the_moon</meta>
 		<meta property="se:url.vcs.github">https://github.com/standardebooks/jules-verne_round-the-moon_ward-lock-co</meta>
 		<dc:creator id="author">Jules Verne</dc:creator>