Upgrade Ruby to 3.0.3 (#17038)

https://www.ruby-lang.org/en/news/2021/11/24/ruby-3-0-3-released/

.ruby-version

@@ -1 +1 @@
-3.0.2
+3.0.3

Dockerfile

@@ -27,7 +27,7 @@ RUN ARCH= && \
 	mv node-v$NODE_VER-linux-$ARCH /opt/node
 
 # Install Ruby 3.0
-ENV RUBY_VER="3.0.2"
+ENV RUBY_VER="3.0.3"
 RUN apt-get update && \
   apt-get install -y --no-install-recommends build-essential \
     bison libyaml-dev libgdbm-dev libreadline-dev libjemalloc-dev \