Update dependency org.slf4j:slf4j-api to v2.0.16 (1.21.x)

[neoforged-renovate]

This PR contains the following updates:

Package	Type	Update	Change
org.slf4j:slf4j-api (source, changelog)	dependencies	patch	2.0.7 -> 2.0.16

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[Matyrobbrt]

Mojang uses SLF4J 2.0.16 (see piston-meta), we should not downgrade it.

[Technici4n]

Can you first check that we are actually downgrading? The NeoForm dependencies should be strict.

[Technici4n]

Of course I don't object to the bump, but we should check that there is no silent downgrading. 😉

[Matyrobbrt]

We indeed are (from a profile)

{"name":"org.slf4j:slf4j-api:2.0.9","url":null,"serverreq":null,"clientreq":null,"natives":null,"extract":null,"rules":null,"downloads":{"artifact":{"path":"org/slf4j/slf4j-api/2.0.9/slf4j-api-2.0.9.jar","url":"https://libraries.minecraft.net/org/slf4j/slf4j-api/2.0.9/slf4j-api-2.0.9.jar","sha1":"7cf2726fdcfbc8610f9a71fb3ed639871f315340","size":64579},"classifiers":null}}

[Matyrobbrt]

Hmm hold on, that's a 1.21.1 profile whoops. Well considering the same version is in neo in 1.21.1 but the mojang version is used in the profile I suppose we aren't downgrading it. I'll still check, tho it's better if we use the correct version anyway (we could also just not touch slf4j in neo...)

[Matyrobbrt]

After looking further into this, that's the compile only slf4j version used by the coremods project. That's confusing and not very ideal... I'll work towards publishing a bom in the gradle mc deps project so we can add that dependency while using the version mojang ships.