Add SECURITY.md [skip ci]

webmaster128 · webmaster128 · commit 07c049598aed · 2022-04-13T08:32:15.000+02:00
diff --git a/SECURITY.md b/SECURITY.md
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+# Security Policy
+
+This repository is maintained by Confio as part of the CosmWasm stack. Please
+see https://github.com/CosmWasm/advisories/blob/main/SECURITY.md for our
+security policy.
