add links in theme.toml

theme.toml

-# theme.toml template for a Hugo theme
-# See https://github.com/gohugoio/hugoThemes#themetoml for an example
-
 name = "Castellum"
 license = "MIT"
-licenselink = "https://github.com/yourname/yourtheme/blob/master/LICENSE"
+licenselink = "https://git.mpib-berlin.mpg.de/castellum/castellum_hugo_theme/-/blob/master/LICENSE"
 description = ""
-homepage = "http://example.com/"
+homepage = "https://git.mpib-berlin.mpg.de/castellum"
 tags = []
 features = []
 min_version = "0.41.0"