fix topic error (#768)

19 jobs for master in 43 minutes and 45 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Check
passed #902424
linux-docker
check-std

00:03:08

passed #902425
linux-docker
check-wasm

00:02:36

 
  Workspace
passed #902426
linux-docker
build-std

00:02:24

passed #902427
linux-docker
build-wasm

00:03:05

passed #902431
linux-docker
clippy-std

00:02:31

passed #902432
linux-docker
clippy-wasm

00:01:55

passed #902430
linux-docker
codecov

00:04:15

passed #902429
linux-docker
docs

00:01:52

passed #902433
linux-docker
fmt

00:01:31

passed #902428
linux-docker
test

00:03:12

 
  Examples
passed #902436
linux-docker
examples-clippy-std

00:01:33

passed #902437
linux-docker
examples-clippy-wasm

00:01:03

passed #902438
linux-docker
examples-contract-build

00:06:00

passed #902439
linux-docker
examples-contract-build-delegator

00:03:57

passed #902440
linux-docker
examples-docs

00:01:52

passed #902435
linux-docker
examples-fmt

00:00:15

passed #902434
linux-docker
examples-test

00:01:59

 
  Fuzz
passed #902441
linux-docker
fuzz-tests

00:30:18

 
  Publish
passed #902442
linux-docker
publish-docs

00:00:30