fix typo in M$ XMP namespace

src/properties.cpp

@@ -95,7 +95,7 @@ namespace Exiv2 {
         { "http://ns.adobe.com/xap/1.0/bj/",              "xmpBJ",          xmpXmpBJInfo,     N_("XMP Basic Job Ticket schema")               },
         { "http://ns.adobe.com/xap/1.0/t/pg/",            "xmpTPg",         xmpXmpTPgInfo,    N_("XMP Paged-Text schema")                     },
         { "http://ns.adobe.com/xmp/1.0/DynamicMedia/",    "xmpDM",          xmpXmpDMInfo,     N_("XMP Dynamic Media schema")                  },
-        { "http://ns.microsoft.com/Photo/1.0/",           "MicrosoftPhoto", xmpMicrosoftInfo, N_("Microsoft Photo schema")                    },
+        { "http://ns.microsoft.com/photo/1.0/",           "MicrosoftPhoto", xmpMicrosoftInfo, N_("Microsoft Photo schema")                    },
         { "http://ns.adobe.com/pdf/1.3/",                 "pdf",            xmpPdfInfo,       N_("Adobe PDF schema")                          },
         { "http://ns.adobe.com/photoshop/1.0/",           "photoshop",      xmpPhotoshopInfo, N_("Adobe photoshop schema")                    },
         { "http://ns.adobe.com/camera-raw-settings/1.0/", "crs",            xmpCrsInfo,       N_("Camera Raw schema")                         },