Add rustc-dev-guide entry

JohnTitor · JohnTitor · commit eacab35596f4 · 2020-04-05T01:29:58.000+09:00
diff --git a/_data/latest.json b/_data/latest.json
@@ -75,5 +75,12 @@
         "linux": "test-fail",
         "commit": "21ed50522ddb998f5367229984a4510af578899f",
         "datetime": "2020-02-14T04:51:15Z"
+    },
+    {
+        "tool": "rustc-dev-guide",
+        "windows": "test-pass",
+        "linux": "test-fail",
+        "commit": "21ed50522ddb998f5367229984a4510af578899f",
+        "datetime": "2020-02-14T04:51:15Z"
     }
 ]
