chore: update documentation URLs to use workspace setting

Replace all docs.rs documentation URLs with documentation.workspace = true
to inherit from the workspace's docs.pezkuwichain.io URL.

docs/sdk/src/reference_docs/chain_spec_runtime/Cargo.toml

@@ -8,7 +8,7 @@ homepage.workspace = true
 repository.workspace = true
 edition.workspace = true
 publish = false
-documentation = "https://docs.rs/pez-chain-spec-guide-runtime"
+documentation.workspace = true
 
 [dependencies]
 codec = { workspace = true }