fix platform_name for {linux,darwin}-aarch64

Author: lewurm

ci.jsonnet

@@ -270,7 +270,7 @@ local part_definitions = {
       },
     },
     linux_aarch64: linux_deps + {
-      platform_name:: "LinuxAArch64",
+      platform_name:: "LinuxARM64",
       platform: "linux",
       arch:: "aarch64",
       "$.cap":: {
@@ -289,7 +289,7 @@ local part_definitions = {
       },
     },
     darwin_aarch64: darwin_aarch64_deps + {
-      platform_name:: "DarwinAArch64",
+      platform_name:: "DarwinARM64",
       platform: "darwin",
       arch:: "aarch64",
       "$.cap":: {