fix(deps): update rust crate nftables to 0.6.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
nftables (source)	dependencies	minor	0.5.0 -> 0.6.0

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Release Notes

namib-project/nftables-rs (nftables)

v0.6.0

Compare Source

⛰️ Features

• (expr) [breaking] Add documentation, default impls for expressions,
  add attributes to socket expression - (13c0849)
• (expr) [breaking] Make range fixed-sized array, not slice - (1ce8021)
• (helper) Add async helpers - (81cd4f3)
• (helper) Generalize helper arguments - (021668a)
• (helper) [breaking] Make helper APIs accept borrowed values - (091adb4)
• [breaking] Replace Cow<'static, _> with 'a - (c22a2a4)
• [breaking] Reduce stack usage by selectively wrapping large values in Box - (583b2d5)
• [breaking] Use Cow whenever possible instead of owned values - (8ddb5ff)

🐛 Bug Fixes

• (expr) [breaking] Revert recursive Cow<[Expression]> back to Vec - (75b7f48)
• (stmt) Allow port-range for nat port - (07d062a)
• (stmt) [breaking] Match anonymous and named quotas - (61ba8ea)
• (tests) Fix datatest_stable::harness macro usage - (3948819)

📚 Documentation

• (helper) Add docs for async helpers - (3a6be32)
• (readme) Fix call to apply_ruleset() - (210e4ee)
• (readme) Update examples - (4857791)
• Define msrv - (dfc8517)

🧪 Testing

• (deserialize) Generate deserialize tests with harness - (68332fd)
• (stmt) Extend nat test with port range - (ad0b46a)

⚙️ Miscellaneous Tasks

• (msrv) [breaking] Increase msrv to 1.76 - (76e7e7a)

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