add astronav and nanochat to merc and NTPD PDAs (#145)

# Description

title
making this a PR because it's slightly more substantial than my
description changes

# Changelog

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:cl:
- add: Added Nanochat and Astronav to NTPD and Urban Solutions PDAs

Resources/Prototypes/_Arc/Entities/Objects/Devices/pda.yml

@@ -21,6 +21,8 @@
       - NewsReaderCartridge
       - CrimeAssistCartridge
       - SecWatchCartridge
+      - AstroNavCartridge
+      - NanoChatCartridge
 
 - type: entity
   parent: IDCardStandard
@@ -91,6 +93,8 @@
   - type: CartridgeLoader
     preinstalled:
       - NotekeeperCartridge
+      - AstroNavCartridge
+      - NanoChatCartridge
 
 - type: entity
   parent: IDCardStandard