Bump ubuntu from `ca70a83` to `daf3e62` in /release (#2349)

Bumps ubuntu from `ca70a83` to `daf3e62`.

---
updated-dependencies:
- dependency-name: ubuntu
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/release/DOCKERFILE b/release/DOCKERFILE
index 77bf29d..c5d0192 100644
--- a/release/DOCKERFILE
+++ b/release/DOCKERFILE
@@ -1,4 +1,4 @@
-FROM ubuntu:bionic@sha256:ca70a834041dd1bf16cc38dfcd24f0888ec4fa431e09f3344f354cf8d1724499
+FROM ubuntu:bionic@sha256:daf3e62183e8aa9a56878a685ed26f3af3dd8c08c8fd11ef1c167a1aa9bd66a3
 RUN apt update
 RUN apt install -y git
 RUN git clone https://chromium.googlesource.com/chromium/tools/depot_tools.git