Update homepage button to link to github repo

Update homepage so that the "Homepage" button on this page https://themes.gohugo.io/hugo-webslides/ links to the github repo (at the moment it links to example.com)

theme.toml

@@ -2,7 +2,7 @@ name = "hugo-webslides"
 license = "MIT"
 licenselink = "https://github.com/RCjacH/hugo-webslides/blob/master/LICENSE.md"
 description = "Hugo-WebSlides - Writing beautiful slides in markdown with Hugo."
-homepage = "http://example.com/"
+homepage = "https://github.com/rcjach/hugo-webslides.git"
 tags = ["slide", "presentation", "responsive", "landing page"]
 features = ["webslides.js", "pre-made template", "shortcodes"]
 min_version = 0.56