libspiro: include UPSTREAM_CHECK_* to fix UNKNOWN_BROKEN status

Adding UPSTREAM_CHECK_URI and UPSTREAM_CHECK_REGEX fix
UNKNOWN_BROKEN status from running devtool check-upgrade-status.

The next version of the package can be found from upstream
sources.

Signed-off-by: Alexandre Truong <alexandre.truong@smile.fr>
Reviewed-by: Yoann Congal <yoann.congal@smile.fr>

meta-oe/recipes-graphics/fontforge/libspiro_20221101.bb

@@ -9,6 +9,9 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
 SRC_URI = "https://github.com/fontforge/libspiro/releases/download/${PV}/libspiro-dist-${PV}.tar.gz"
 SRC_URI[sha256sum] = "5984fb5af3e4e1f927f3a74850b705a711fb86284802a5e6170b09786440e8be"
 
+UPSTREAM_CHECK_URI = "https://github.com/fontforge/libspiro/releases"
+UPSTREAM_CHECK_REGEX = "(?P<pver>\d+)"
+
 inherit autotools
 
 BBCLASSEXTEND = "native"