Bump restic/restic from 0.18.0 to 0.18.1

Bumps restic/restic from 0.18.0 to 0.18.1.

---
updated-dependencies:
- dependency-name: restic/restic
  dependency-version: 0.18.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -13,7 +13,7 @@ RUN if [ "$TARGETPLATFORM" = "linux/amd64" ]; then \
     fi
 
 
-FROM docker.io/restic/restic:0.18.0
+FROM docker.io/restic/restic:0.18.1
 
 RUN apk add --update --no-cache curl mailx shadow