[BRANDING] Rebrand default meta tags

(cherry picked from commit fedeadb738)

modules/setting/setting.go

@@ -334,9 +334,9 @@ var (
 			Description string
 			Keywords    string
 		}{
-			Author:      "Gitea - Git with a cup of tea",
-			Description: "Gitea (Git with a cup of tea) is a painless self-hosted Git service written in Go",
-			Keywords:    "go,git,self-hosted,gitea",
+			Author:      "Forgejo – Beyond coding. We forge.",
+			Description: "Forgejo is a self-hosted lightweight software forge. Easy to install and low maintenance, it just does the job.",
+			Keywords:    "git,forge,forgejo",
 		},
 	}