Fix diagram in README.md (#664)

Author: Yuki Kobayashi

README.md

@@ -48,18 +48,18 @@ flowchart TD
     A_draft -- publish draft by contributor --> A:::creator
     A -- by contributor --> B[Awaiting review]:::anyone
     A -- by core dev --> C[Awaiting core review]:::coredev
-    B & C -- new review by\nanother contributor --> C
-    C & B & E  -- new core review\nrequests changes --> D[Awaiting changes]:::creator
+    B & C -- new review by<br>another contributor --> C
+    C & B & E  -- new core review<br>requests changes --> D[Awaiting changes]:::creator
     D -- changes by contributor --> E[Awaiting change review]:::coredev
-    C & E & B -- new core review\napproves ---> F[Awaiting merge]:::coredev
-    G[When a review is dismissed\nthe highest remaining state is restored\nbased on the remaining reviews]
+    C & E & B -- new core review<br>approves ---> F[Awaiting merge]:::coredev
+    G[When a review is dismissed<br>the highest remaining state is restored<br>based on the remaining reviews]
 classDef creator stroke:#CC0;
 classDef anyone stroke:#00C;
 classDef coredev stroke:#0C0;
 classDef triager stroke:#C0C;
-linkStyle 0,1,7 stroke:#CC0,color:auto;
-linkStyle 2,3 stroke:#00C,color:auto;
-linkStyle 4,5,6,8,9,10 stroke:#0C0,color:auto;
+linkStyle 0,1,8 stroke:#CC0,color:auto;
+linkStyle 3,4 stroke:#00C,color:auto;
+linkStyle 2,5,6,7,9,10,11 stroke:#0C0,color:auto;
 ```
 
 ## *Aside*: where does the name come from?