Mark strlcat strlcpy as optional

https://salsa.debian.org/ruby-team/ruby/-/commit/dc21eb030774887e255f9b8708d28fedc740ec1e

Author: sorah

debian/libruby3.3.symbols

@@ -1804,5 +1804,5 @@ libruby-3.3.so.3.3 libruby3.3 #MINVER#
  ruby_xrealloc2@Base 3.3.0-0nkmi1
  ruby_xrealloc@Base 3.3.0-0nkmi1
  setproctitle@Base 3.3.0-0nkmi1
- strlcat@Base 3.3.0-0nkmi1
- strlcpy@Base 3.3.0-0nkmi1
+ (optional)strlcat@Base 3.3.0-0nkmi1
+ (optional)strlcpy@Base 3.3.0-0nkmi1