pkcs5: build with all-features = true on docs.rs (#2303)

Looks like the wrong line got deleted from the config, whoops

Author: tarcieri

pkcs5/Cargo.toml

@@ -47,4 +47,4 @@ sha1-insecure = ["dep:sha1", "pbes2"]
 workspace = true
 
 [package.metadata.docs.rs]
-rustdoc-args = ["--cfg", "docsrs"]
+all-features = true