Dockerfile typo

Signed-off-by: tzununbekov <t.zununbekov@gmail.com>

Author: tzununbekov

ruby-2.5/Dockerfile

@@ -4,7 +4,7 @@ FROM ruby:2.5-alpine
 RUN apk --no-cache add curl \
     && API_VERSION=$(curl -sI https://github.com/triggermesh/aws-custom-runtime/releases/latest | grep "Location:" | awk -F "/" '{print $NF}' | tr -d "\r") \
     && curl -sL https://github.com/triggermesh/aws-custom-runtime/releases/download/${API_VERSION}/aws-custom-runtime > aws-custom-runtime \
-    && chmod +x aws-custom-runtime \
+    && chmod +x aws-custom-runtime
 
 ENV RUBYLIB "/opt"
 ENV LAMBDA_TASK_ROOT "/opt"