graphviz: update to 8.1.0.

srcpkgs/graphviz/template

@@ -1,6 +1,6 @@
 # Template file for 'graphviz'
 pkgname=graphviz
-version=8.0.4
+version=8.1.0
 revision=1
 build_style=gnu-configure
 configure_args="--with-gts --with-ann=no"
@@ -16,7 +16,7 @@ license="EPL-1.0"
 homepage="https://www.graphviz.org"
 changelog="https://gitlab.com/graphviz/graphviz/-/raw/main/CHANGELOG.md"
 distfiles="https://gitlab.com/graphviz/graphviz/-/archive/${version}/graphviz-${version}.tar.gz"
-checksum=7b9fb6bdc2a79c38edd43a68d1383937e698210acf395bba63f0a07da693f3ac
+checksum=2e4dfee3c24925ad51d1e76a9fb2b19b26a5a0049ef7be6d3e52667aac72eabe
 
 # `make check` is broken:
 # https://gitlab.com/graphviz/graphviz/-/issues/2112

srcpkgs/graphviz/update

@@ -0,0 +1,2 @@
+site="https://gitlab.com/graphviz/graphviz/-/tags"
+pattern='stable_release_*\K[\d.]*(?=\.tar\.gz)'