security: add announcements section
Please get in touch with the team at fluentbit-security@googlegroups.com, and we'll take it from there.
Thank you in advance for helping to keep Fluent-bit secure.
+
+## Announcements
+
+For related CVEs that may or not affect Fluent Bit we'll be doing the corresponding announcement through [discussions](https://github.com/fluent/fluent-bit/discussions).
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