[nobug] fix another typo in snippet contribution

diff --git a/web/bundles/org.eclipse.wst.html.ui/plugin.properties b/web/bundles/org.eclipse.wst.html.ui/plugin.properties
index c12e393..559e081 100644
--- a/web/bundles/org.eclipse.wst.html.ui/plugin.properties
+++ b/web/bundles/org.eclipse.wst.html.ui/plugin.properties

@@ -98,7 +98,7 @@
 ampersand.content = &amp;
 doublequote.label = " double quotation mark
 doublequote.content = &quot;
-singlequote.label = " apostrophe/single quotation mark
+singlequote.label = ' apostrophe/single quotation mark
 singlequote.content = &apos;
 cent.label = ¢ cent
 cent.content = &cent;
@@ -121,4 +121,4 @@
 smiley.label = \uD83D\uDE42 slightly smiling face
 smiley.content = \uD83D\uDE42
 
-category.label = HTML
\ No newline at end of file
+category.label = HTML