radv: Replace "abi_versions" with correct "api_version".

git history shows "abi_versions" was used from the outset.

Cc: <mesa-stable@lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98415
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/dev_icd.json.in

@@ -2,6 +2,6 @@
     "file_format_version": "1.0.0",
     "ICD": {
         "library_path": "@build_libdir@/libvulkan_radeon.so",
-        "abi_versions": "1.0.3"
+        "api_version": "1.0.3"
     }
 }

src/amd/vulkan/radeon_icd.json

@@ -2,6 +2,6 @@
     "file_format_version": "1.0.0",
     "ICD": {
         "library_path": "libvulkan_radeon.so",
-        "abi_versions": "1.0.3"
+        "api_version": "1.0.3"
     }
 }