Update toolstate maintainers

This updates the toolstate maintainers to more closely match who is
still active. I am adding myself to ensure these get resolved if they
break, since otherwise it causes other problems.

src/tools/publish_toolstate.py

@@ -30,11 +30,17 @@
 # These should be collaborators of the rust-lang/rust repository (with at least
 # read privileges on it). CI will fail otherwise.
 MAINTAINERS = {
-    "book": {"carols10cents"},
-    "nomicon": {"frewsxcv", "Gankra", "JohnTitor"},
-    "reference": {"Havvy", "matthewjasper", "ehuss"},
-    "rust-by-example": {"marioidival"},
-    "embedded-book": {"adamgreig", "andre-richter", "jamesmunns", "therealprof"},
+    "book": {"ehuss", "chriskrycho", "carols10cents"},
+    "nomicon": {"ehuss", "JohnTitor"},
+    "reference": {"ehuss"},
+    "rust-by-example": {"ehuss", "marioidival"},
+    "embedded-book": {
+        "ehuss",
+        "adamgreig",
+        "andre-richter",
+        "jamesmunns",
+        "therealprof",
+    },
     "edition-guide": {"ehuss"},
 }