Bump debian from 93492d1 to 26f2a7c in /images/bitcoind

Bumps debian from `93492d1` to `26f2a7c`.

---
updated-dependencies:
- dependency-name: debian
  dependency-version: bookworm
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

images/bitcoind/Dockerfile

@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.3-labs
-FROM debian:bookworm@sha256:93492d1405a072c9d3b89110490e330e0b7eb37754cafc9520908b7fe6873f5f as build
+FROM debian:bookworm@sha256:26f2a7cab45014541c65f9d140ccfa6aaefbb49686c6759bea9c6f7f5bb3d72f as build
 
 ARG VERSION=v30.0