gnu: rust-futures-io-0.3: Update to 0.3.12.

* gnu/packages/crates-io.scm (rust-futures-io-0.3): Update to 0.3.12.
[arguments]: Skip build.
[home-page]: Update URI.
[synopsis]: Improve typography.

gnu/packages/crates-io.scm

@@ -14816,7 +14816,7 @@ intrusive collections.")
 (define-public rust-futures-io-0.3
   (package
     (name "rust-futures-io")
-    (version "0.3.8")
+    (version "0.3.12")
     (source
      (origin
        (method url-fetch)
@@ -14825,14 +14825,16 @@ intrusive collections.")
         (string-append name "-" version ".tar.gz"))
        (sha256
         (base32
-         "1frh7d0n96lczy22al3bkgwpq0p1agbgax5kqh9vv8da33738631"))))
+         "0005hz30pdxlbdamhd0imixmxcjpwrfxxr27kljxh6i84lshbgi8"))))
     (build-system cargo-build-system)
-    (home-page "https://rust-lang-nursery.github.io/futures-rs")
+    (arguments `(#:skip-build? #t))
+    (home-page "https://rust-lang.github.io/futures-rs")
     (synopsis
-     "`AsyncRead` and `AsyncWrite` traits for the futures-rs library")
+     "@code{AsyncRead} and @code{AsyncWrite} traits for the @code{futures-rs}
+library")
     (description
      "This package provides the @code{AsyncRead} and @code{AsyncWrite} traits
-for the futures-rs library.")
+for the @code{futures-rs} library.")
     (license (list license:expat license:asl2.0))))
 
 (define-public rust-futures-io-preview-0.3