Fix output path in installer (#3730)

Author: TheNormalnij

Shared/installer/nightly.nsi

@@ -689,6 +689,8 @@ SectionGroup /e "$(INST_SEC_CLIENT)" SECGCLIENT
 
 	# Added as per https://bitbucket.org/chromiumembedded/cef/commits/8424f166ccef
 	# Not currently using \mta\cef\ due to https://github.com/chromiumembedded/cef/issues/3749#issuecomment-2278568964 (it's already crashing and likely won't remain supported)
+        SetOutPath "$INSTDIR\MTA"
+
         File "${FILES_ROOT}\mta\chrome_100_percent.pak"
         File "${FILES_ROOT}\mta\chrome_200_percent.pak"
         File "${FILES_ROOT}\mta\resources.pak"