graphics/qgis-ltr: Update to 3.28.6

Changelog: https://github.com/qgis/QGIS/compare/final-3_28_5%5E...final-3_28_6

Reported by:	portscout, Repology
MFH:		2023Q2

graphics/qgis-ltr/Makefile

 PORTNAME=	qgis
-DISTVERSION=	3.28.5
-PORTREVISION=	2
+DISTVERSION=	3.28.6
 CATEGORIES=	graphics geography
 MASTER_SITES=	https://qgis.org/downloads/
 PKGNAMESUFFIX=	-ltr

graphics/qgis-ltr/distinfo

-TIMESTAMP = 1680290201
-SHA256 (qgis-3.28.5.tar.bz2) = 9570dc580808ea61ba6fc4aac4f5078769bce228e66c54dba786130569e6aef1
-SIZE (qgis-3.28.5.tar.bz2) = 158821819
+TIMESTAMP = 1682860919
+SHA256 (qgis-3.28.6.tar.bz2) = 2dfacce09f59e6c8cac621dee94bba4c20aa303ca1a204ee70bbddd7c2a301e0
+SIZE (qgis-3.28.6.tar.bz2) = 158638644

graphics/qgis-ltr/pkg-plist

@@ -3105,6 +3105,7 @@ share/metainfo/org.qgis.qgis.appdata.xml
 %%DATADIR%%/i18n/qgis_ro.qm
 %%DATADIR%%/i18n/qgis_ru.qm
 %%DATADIR%%/i18n/qgis_sc.qm
+%%DATADIR%%/i18n/qgis_sk.qm
 %%DATADIR%%/i18n/qgis_sv.qm
 %%DATADIR%%/i18n/qgis_tr.qm
 %%DATADIR%%/i18n/qgis_uk.qm