add tyler and dan to toolchain_buildbuddy maintainers (#6585)

Author: tyler-french

modules/toolchains_buildbuddy/metadata.json

@@ -12,6 +12,18 @@
             "github": "fmeum",
             "name": "Fabian Meumertzheim",
             "github_user_id": 4312191
+        },
+        {
+            "email": "[email protected]",
+            "github": "dan-stowell",
+            "name": "Dan Stowell",
+            "github_user_id": 56944708
+        },
+        {
+            "email": "[email protected]",
+            "github": "tyler-french",
+            "name": "Tyler French",
+            "github_user_id": 66684063
         }
     ],
     "repository": [