meta:install.conf: Ignore missing hidden files

The install script is broken since 4716b1cab3 ("meta:install: Link
hidden files in .config as well"), as dotbot will complain that there is
no hidden file to glob in `.config`.

Add `ignore-missing` so that the installation runs through while still
supporting hidden files in the future.

meta/install.conf.yaml

@@ -71,6 +71,7 @@
         path: .config/*
     ~/.config/:
         glob: true
+        ignore-missing: true
         path: .config/.*
     ~/.local/bin/:
         create: true