perl-html-tagset: add license hash

Signed-off-by: Francois Perrad <francois.perrad@gadz.org>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/perl-html-tagset/perl-html-tagset.hash

@@ -1,3 +1,6 @@
 # retrieved by scancpan from http://cpan.metacpan.org/
 md5    d2bfa18fe1904df7f683e96611e87437 HTML-Tagset-3.20.tar.gz
 sha256 adb17dac9e36cd011f5243881c9739417fd102fce760f8de4e9be4c7131108e2 HTML-Tagset-3.20.tar.gz
+
+# computed by scancpan
+sha256 275cc182d78ac2db6856442c5d334c925350fb56fe83ee3577f5850317423419 README