Rename CyclopsBlink_handle_mod_0xf_command.yar.txt to CyclopsBlink_handle_mod_0xf_command.yar

yara/CyclopsBlink_handle_mod_0xf_command.yar

@@ -19,4 +19,4 @@ control flags and a format string used for file content upload"
  $ = "file:%s\n" fullword
  condition:
  (uint32(0) == 0x464c457f) and (all of them)
-}
+}