Bump aiida-core to 2.4.3 to include fix of mpi setup (#427)

aiida-core 2.4.3 include the fix aiidateam/aiida-core#6218 for correctly setup the mpi option of code.

Author: unkcpz

build.json

@@ -7,7 +7,7 @@
       "default": "15"
     },
     "AIIDA_VERSION": {
-      "default": "2.4.0"
+      "default": "2.4.3"
     },
     "AIIDALAB_VERSION": {
       "default": "23.03.2"