testing/cargo-c: upgrade to 0.9.1

Ref https://github.com/lu-zero/cargo-c/releases/tag/v0.9.1
8 jobs for !22919 with cargo-c in 30 minutes and 59 seconds (queued for 1 second)
detached
Status Job ID Name Coverage
  Lint
passed #431009
docker-alpine x86_64
lint

00:00:17

 
  Build
passed #431014
docker-alpine ci-build aarch64
build-aarch64

00:21:26

passed #431016
docker-alpine ci-build armhf
build-armhf

00:30:39

passed #431015
docker-alpine ci-build armv7
build-armv7

00:25:26

passed #431013
docker-alpine ci-build ppc64le
build-ppc64le

00:10:51

passed #431012
docker-alpine ci-build s390x
build-s390x

00:00:47

passed #431011
docker-alpine ci-build x86
build-x86

00:07:55

passed #431010
docker-alpine ci-build x86_64
build-x86_64

00:06:09