make use of confgen correctly setting template environment now

.config/gtk-3.0/bookmarks.cgt

@@ -2,6 +2,6 @@
 -- File containing GTK3 filemanager bookmarks
 -- Used by Thunar among others
 local bookmarks = opt.filemanager_bookmarks or {}
-for _, bm in _G.pairs(bookmarks) do
+for _, bm in pairs(bookmarks) do
 !>file://<% bm %>
 <! end !>

.config/rofi/config.rasi.cgt

@@ -1,7 +1,7 @@
 <!
 -- Only enable nheko mode if rofi-nheko is installed.
 local have_rofi_nheko = opt.fileExists(
-    _G.os.getenv "HOME"
+    os.getenv "HOME"
     .. "/.local/lib/rofi/librofi_nheko.so"
 )
 !>