Bump frolvlad/alpine-python3 in /benchmarks/docker (#1162)

Bumps frolvlad/alpine-python3 from `c7a6aad` to `2d3eda5`.

---
updated-dependencies:
- dependency-name: frolvlad/alpine-python3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

benchmarks/docker/Dockerfile-benchmark

@@ -1,4 +1,4 @@
-FROM frolvlad/alpine-python3@sha256:c7a6aad81a6f550fab3607a15eb6a60aa308859922a8f4e74c2f27ce6a578bdc
+FROM frolvlad/alpine-python3@sha256:2d3eda5965d1017f1962674c33c62829541b653145376c54398b91704d503bac
 
 RUN apk add docker openrc
 RUN rc-update add docker boot