[BUG] command_fastdl.sh: 'fastdl_directories_array' listed directory 'resources', when it should be 'resource'

## User Story

The LGSM fastdl feature fails to gather and install any content in the standard '/resource' directory as the hard-coded array contains the plural form, 'resources'. An understandable typo and one would assume _all_ directories to be in the plural form ;)

As a system admin, I want to suggest the 'fastdl_directories_array' be amended to use 'resource' so that all expected files are present in the fastdl directory.

## Basic info

* **Distro:** [Ubuntu 22.04]
* **Game:** [Empires Mod]
* **Command:** [fastdl]
* **LinuxGSM version:** [v22.1.0]

## Further Information

As per the User Story, I believe simply updating the fastdl_directories_array in lgsm/functions/command_fastdl.sh to use 'resource' will correctly gather all required files.

## To Reproduce

Steps to reproduce the behaviour:
1. ./emserver fastdl
2. Compare public_html/fastdl to expected files
3. Note missing 'resource' directory

## Expected behaviour
'~/serverfiles/empires/resource' directory's content is correctly compressed and present in the '~public_html/fastdl/resource' directory