add Russian translation

with thanks to cutiegin

Changelog.md

@@ -6,6 +6,7 @@
 - New: Item tag "securitycraft:keycard_holder_can_hold" for all items that can be put into a Keycard Holder (contains the securitycraft:keycards item tag and the Limited Use Keycard by default)
 - New: Reinforced Soul Sand and Reinforced Magma Block
 - New: The Block Change Detector can now be placed on walls and the ceiling
+- New: Russian translation (Thanks cutiegin!)
 - Change: Security Camera head display
 - Change: The damage taken when suffocating in a reinforced block is now halved (from 5 hearts to two and a half hearts)
 - Change: IMS bombs can no longer be diverted from their path using explosions 

sort_language_file_content.py

@@ -1,4 +1,4 @@
-languages = ["de_de", "en_gb", "en_us", "es_es", "fr_fr", "it_it", "ja_jp", "ko_kr", "zh_cn"]
+languages = ["de_de", "en_gb", "en_us", "es_es", "fr_fr", "it_it", "ja_jp", "ko_kr", "ru_ru", "zh_cn"]
 
 for language in languages:
 	file_name = "src/main/resources/assets/securitycraft/lang/" + language + ".json"