docs: update date

Author: be-marc

DESCRIPTION

@@ -1,7 +1,7 @@
 Package: mlr3spatial
 Title: Support for Spatial Objects Within the 'mlr3' Ecosystem
 Version: 0.5.0
-Date: 2023-05-03
+Date: 2024-03-09
 Authors@R:
     c(
      person("Marc", "Becker", , "[email protected]", role = c("aut", "cre"),
@@ -37,7 +37,6 @@ Suggests:
     mlr3learners (>= 0.4.5),
     paradox,
     ranger,
-    raster (>= 3.6-11),
     rmarkdown,
     rpart,
     stars (>= 0.5-5),