chore(deps): update distroless_base docker digest to 7a4bffc

Author: renovate[bot]

examples/toolchains/cc_cross_osx_to_linux_amd64/WORKSPACE

@@ -147,7 +147,7 @@ load("@rules_oci//oci:pull.bzl", "oci_pull")
 
 oci_pull(
     name = "distroless_base",
-    digest = "sha256:c925d12234f8d3fbef2256012b168004d4c47a82c4f06afcfd06fd208732fbe0",
+    digest = "sha256:7a4bffcb07307d97aa731b50cb6ab22a68a8314426f4e4428335939b5b1943a5",
     image = "gcr.io/distroless/base",
     platforms = [
         "linux/amd64",