chore(deps): update ruby docker tag to v2.6.10 (#2754)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

ci/images/debian/Dockerfile.ruby26

@@ -1,5 +1,5 @@
 # Base-image
-FROM ruby:2.6.9-slim-bullseye AS base
+FROM ruby:2.6.10-slim-bullseye@sha256:3d641979a7dc819b4c253dc62d2f74800817053247005f72b871d164498109df AS base
 
 ARG ATOM_RUBY_VERSION=3.4.5
 ARG DEBIAN_REPO