versions.json: set version to 2.13.1006

Set version to 2.13.1006 to prepare for ptl-006 release.

Signed-off-by: Adrian Bonislawski <adrian.bonislawski@intel.com>

Author: abonislawski

versions.json

@@ -2,6 +2,6 @@
   "SOF": {
     "MAJOR": "2",
     "MINOR": "13",
-    "MICRO": "99"
+    "MICRO": "1006"
   }
 }