Upgrade ruby to v.2.7.6

Author: sachilles

Changelog.md

@@ -6,6 +6,7 @@ This file only reflects the changes that are made in this image. Please refer to
 - gitlab: upgrade CE to v14.9.3
 - gitaly: upgrade to v14.9.3
 - golang: upgrade to v1.17.9
+- ruby: upgrade to v2.7.6
 - ubuntu: upgrade to focal-20220404
 
 **14.9.2**

Dockerfile

@@ -3,8 +3,8 @@ FROM ubuntu:focal-20220404
 ARG VERSION=14.9.3
 
 ENV GITLAB_VERSION=${VERSION} \
-    RUBY_VERSION=2.7.5 \
-    RUBY_SOURCE_SHA256SUM="2755b900a21235b443bb16dadd9032f784d4a88f143d852bc5d154f22b8781f1" \
+    RUBY_VERSION=2.7.6 \
+    RUBY_SOURCE_SHA256SUM="e7203b0cc09442ed2c08936d483f8ac140ec1c72e37bb5c401646b7866cb5d10" \
     GOLANG_VERSION=1.17.9 \
     GITLAB_SHELL_VERSION=13.24.0 \
     GITLAB_PAGES_VERSION=1.56.1 \