updates Vatican Library manifest to HTTPS

index.html

@@ -67,7 +67,7 @@
            { "manifestUri": "https://data.ucd.ie/api/img/manifests/ucdlib:30708", "location": "University College Dublin"},
            { "manifestUri": "http://dzkimgs.l.u-tokyo.ac.jp/iiif/zuzoubu/12b02/manifest.json", "location": "University of Tokyo"},
            { "manifestUri": "http://www2.dhii.jp/nijl/NIJL0018/099-0014/manifest_tags.json", "location": "NIJL"},
-           { "manifestUri": "http://digi.vatlib.it/iiif/MSS_Vat.lat.3225/manifest.json", "location": "Vatican Library"},
+           { "manifestUri": "https://digi.vatlib.it/iiif/MSS_Vat.lat.3225/manifest.json", "location": "Vatican Library"},
            { "manifestUri": "http://media.nga.gov/public/manifests/nga_highlights.json", "location": "National Gallery of Art"},
            { "manifestUri": "http://demos.biblissima-condorcet.fr/iiif/metadata/BVMM/chateauroux/manifest.json", "location": "Biblissima"},
            { "manifestUri": "https://manifests.britishart.yale.edu/Osbornfa1", "location": "Yale Beinecke"},