fix sniper hotkey conflict AGAIN

You can't use `s`, it's a combat hotkey.

mods/ra/rules/infantry.yaml

@@ -454,7 +454,7 @@ SNIPER:
 		BuildPaletteOrder: 80
 		Owner: soviet
 		Prerequisites: dome
-		Hotkey: s
+		Hotkey: h
 	Selectable:
 		Bounds: 12,17,0,-6
 	Mobile:
@@ -482,4 +482,4 @@ SNIPER:
 		UncloakOnMove: yes
 	Captures:
 		CaptureTypes: civilianbuilding
-		AllowAllies: true
+		AllowAllies: true