Update dartdoc to 1.0.2.

Release notes for v1.0.2: https://github.com/dart-lang/dartdoc/releases/tag/v1.0.2
Release notes for v1.0.1: https://github.com/dart-lang/dartdoc/releases/tag/v1.0.1

Change-Id: Ifd82d8314b611fbf2be35a5f6cd8ee815894e240
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/209660
Auto-Submit: Janice Collins <jcollins@google.com>
Reviewed-by: Samuel Rawlins <srawlins@google.com>
Commit-Queue: Janice Collins <jcollins@google.com>
diff --git a/DEPS b/DEPS
index 288bd01..e33bf57 100644
--- a/DEPS
+++ b/DEPS
@@ -106,7 +106,7 @@
   # For more details, see https://github.com/dart-lang/sdk/issues/30164
   "dart_style_rev": "06bfd19593ed84dd288f67e02c6a753e6516288a",
 
-  "dartdoc_rev" : "c9621b92c738ec21a348cc2de032858276e9c774",
+  "dartdoc_rev" : "5f39ec674d81f5c199151d823fa4ecd01fc59eb2",
   "devtools_rev" : "64cffbed6366329ad05e44d48fa2298367643bb6",
   "jsshell_tag": "version:88.0",
   "ffi_rev": "4dd32429880a57b64edaf54c9d5af8a9fa9a4ffb",