API doc issue: Update sqlite-tutorial CString section with correct ascii code

Closes https://github.com/dart-lang/sdk/pull/44042
https://github.com/dart-lang/sdk/pull/44042

GitOrigin-RevId: 2783fe93da270636d5453e03c6cd2c15b8e3c4cd
Change-Id: I663e840cee0d73002c401541bace0bd4016d8e36
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/170161
Reviewed-by: Daco Harkes <dacoharkes@google.com>
Commit-Queue: Daco Harkes <dacoharkes@google.com>
diff --git a/samples/ffi/sqlite/docs/sqlite-tutorial.md b/samples/ffi/sqlite/docs/sqlite-tutorial.md
index 9b8e7e1..c7ea858 100644
--- a/samples/ffi/sqlite/docs/sqlite-tutorial.md
+++ b/samples/ffi/sqlite/docs/sqlite-tutorial.md
@@ -92,9 +92,9 @@
 
 ```dart
 CString string = allocate(count: 4).cast(); // Allocates 4 bytes and casts it to a string.
-string.value = 73;                          // Stores 'F' at index 0.
-string[1] = 73;                             // Stores 'F' at index 1.
-string[2] = 70;                             // Stores 'I' at index 2.
+string.value = 70;                          // Stores 'F' at index 0.
+string[1] = 70;                             // Stores 'F' at index 1.
+string[2] = 73;                             // Stores 'I' at index 2.
 string[3] = 0;                              // Null terminates the string.
 ```