Update target-locked hashes.

Author: microbit-carlos

target-locked.json

@@ -53,7 +53,7 @@
     "generate_hex": true,
     "libraries": [
         {
-            "branch": "5f1d1751391b1abef533c7ed16945ba036dab849",
+            "branch": "c4b2601c30f4d0a2e1298f01852db6659407a800",
             "name": "codal-core",
             "type": "git",
             "url": "https://github.com/lancaster-university/codal-core"
@@ -65,7 +65,7 @@
             "url": "https://github.com/lancaster-university/codal-nrf52"
         },
         {
-            "branch": "d41d5c7ebe53a1d01935e61d4ffa891e5112e119",
+            "branch": "4b8abc690f6c9fca6132e6db5ee13a795a263f88",
             "name": "codal-microbit-nrf5sdk",
             "type": "git",
             "url": "https://github.com/microbit-foundation/codal-microbit-nrf5sdk"