header: Update MacOS json files to 1.1.77 header

Change-Id: I41477ea32e73987983baee80e1b8fbd3e0f3d671
diff --git a/icd/macos/VkICD_mock_icd.json b/icd/macos/VkICD_mock_icd.json
index 96b7eba..b2484e3 100644
--- a/icd/macos/VkICD_mock_icd.json
+++ b/icd/macos/VkICD_mock_icd.json
@@ -2,7 +2,7 @@
     "file_format_version" : "1.0.1",
     "ICD": {
         "library_path": "./libVkICD_mock_icd.dylib",
-        "api_version": "1.1.71"
+        "api_version": "1.1.77"
     }
 }