Bump distroless/nodejs20-debian12 from 3d8ce4f to a70f4f8 in /.gi…

…thub/docker in the distroless group (#1395)

Bumps the distroless group in /.github/docker with 1 update:
distroless/nodejs20-debian12.

Updates `distroless/nodejs20-debian12` from `3d8ce4f` to `a70f4f8`


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.github/docker/Dockerfile.distroless-nodejs-debian

@@ -1,3 +1,3 @@
-FROM gcr.io/distroless/nodejs20-debian12:latest@sha256:3d8ce4f2928114e4c1a89c1fd327064b8a0aea40fe967793fb3f9dbea2213a39
+FROM gcr.io/distroless/nodejs20-debian12:latest@sha256:a70f4f8e3ecaf94e04b4c8073d9a5c0b596339ac9c6016a03b676747bfb8a301
 
 CMD echo this is a dummy file used to automate dependency upgrades for plugins