Update gcr.io/oss-fuzz-base/base-builder-python Docker digest to 25c7fcf

Author: renovate[bot]

.clusterfuzzlite/Dockerfile

@@ -10,7 +10,7 @@
 # property-test suite in tests/ remains the primary fuzzing surface
 # for the rest of bernstein's input handling.
 # Ref: https://google.github.io/clusterfuzzlite/build-integration/python-lang/
-FROM gcr.io/oss-fuzz-base/base-builder-python@sha256:3dbcb2fba5b92507146862ff7cd612908430137e60a112fd6425240163649a31
+FROM gcr.io/oss-fuzz-base/base-builder-python@sha256:25c7fcf0ea816f1532266bad1e38f5d8380eec72c8efe372c42664d64c55478e
 
 COPY . /src/bernstein
 WORKDIR /src/bernstein