Use fresh CMake in update-checkout-config.json

Author: MaxDesiatov

utils/update_checkout/update-checkout-config.json

@@ -106,7 +106,7 @@
                 "ninja": "release",
                 "icu": "release-65-1",
                 "yams": "4.0.2",
-                "cmake": "v3.16.5",
+                "cmake": "v3.19.6",
                 "indexstore-db": "main",
                 "sourcekit-lsp": "main",
                 "swift-format": "main"