Update the bug number for supporting digits in minifiers.

Bug: 132812927
Change-Id: I9ace70658c1563ae8d66ff4cabb25f9a70019cc6
diff --git a/src/main/java/com/android/tools/r8/utils/StringUtils.java b/src/main/java/com/android/tools/r8/utils/StringUtils.java
index c5b5d6b..9064579 100644
--- a/src/main/java/com/android/tools/r8/utils/StringUtils.java
+++ b/src/main/java/com/android/tools/r8/utils/StringUtils.java
@@ -266,7 +266,7 @@
   }
 
   public static String numberToIdentifier(int nameCount, char[] prefix, boolean addSemicolon) {
-    // TODO(herhut): Add support for using numbers.
+    // TODO(b132812927): Add support for using numbers.
     int size = addSemicolon ? 1 : 0;
     int number = nameCount;
     while (number >= NUMBER_OF_LETTERS) {