nano: update to 9.1

https://lists.gnu.org/archive/html/info-gnu/2026-06/msg00008.html

editors/nano/Portfile

@@ -3,7 +3,7 @@
 PortSystem          1.0
 
 name                nano
-version             9.0
+version             9.1
 revision            0
 categories          editors
 license             GPL-3
@@ -19,9 +19,9 @@ long_description \
 homepage            https://www.nano-editor.org
 master_sites        ${homepage}/dist/v[strsed ${version} {/\.[0-9]*$//}]/ gnu
 
-checksums           rmd160  87188aa8d67fae19ed8e5792471a68fcbd0b73a9 \
-                    sha256  48a9cf0d021ddaf9d7b567ed30396147d4d2e3f7a32644f83257a7efead2b380 \
-                    size    3679057
+checksums           rmd160  d9b340cb135b440947049f853f61b4c51d87dc01 \
+                    sha256  2647a33f3c2ff3dc45168aeccff61abc7eae8bf99ac1d35574175c23bde6050b \
+                    size    3679915
 
 depends_build       port:gettext