rename folder to dbscripts

db-update/README.md → dbscripts/README.md

-# db-update
+# dbscripts on Git
 
 To test:
 
 1. Run `./demo-init.sh` to create `staging` and `meta` folders structure (for `*.pkg.tar.xz` and json files respectively)
 1. Copy a few packages (with signatures) to e.g. `staging/community` dir
-1. Run `./db-update/`
+1. Run `./db-update`
 1. Check the contents of `meta/**/*.json` files!