gnu: pango: Update to 1.38.1.

* gnu/packages/gtk.scm (pango): Update to 1.38.1.

gnu/packages/gtk.scm

@@ -182,7 +182,7 @@ affine transformation (scale, rotation, shear, etc.).")
 (define-public pango
   (package
    (name "pango")
-   (version "1.36.8")
+   (version "1.38.1")
    (source (origin
             (method url-fetch)
             (uri (string-append "mirror://gnome/sources/pango/"
@@ -190,7 +190,7 @@ affine transformation (scale, rotation, shear, etc.).")
                                 name "-" version ".tar.xz"))
             (sha256
              (base32
-              "01rdzjh68w8l5zn0648yibyarj8p6g7yfn59nw5awaz1i8dvbnqq"))))
+              "1dsf45m51i4rcyvh5wlxxrjfhvn5b67d5ckjc6vdcxbddjgmc80k"))))
    (build-system gnu-build-system)
    (propagated-inputs
     `(("cairo" ,cairo)