chore: Allow OpenSSL license (needed for ring and aws-lc-sys crates) (#464)

* chore: Allow OpenSSL license (needed for aws-lc-sys crate)

* Update deny.toml

Author: sbernauer

template/deny.toml

@@ -26,6 +26,7 @@ allow = [
     "LicenseRef-webpki",
     "MIT",
     "MPL-2.0",
+    "OpenSSL", # Needed for the ring and/or aws-lc-sys crate. See https://github.com/stackabletech/operator-templating/pull/464 for details
     "Unicode-3.0",
     "Unicode-DFS-2016",
     "Zlib",