chore(deps): update reviewdog to 0.21.0 (#3521)

Co-authored-by: sobolevn <4660275+sobolevn@users.noreply.github.com>

Author: github-actions[bot]

Dockerfile

@@ -21,7 +21,7 @@ LABEL maintainer="mail@sobolevn.me"
 LABEL vendor="wemake.services"
 
 ENV WPS_VERSION='1.4.0'
-ENV REVIEWDOG_VERSION='v0.20.3'
+ENV REVIEWDOG_VERSION='v0.21.0'
 
 RUN apk add --no-cache bash git wget
 RUN pip install "wemake-python-styleguide==$WPS_VERSION" \