Add new iOS versions and build numbers (#451)

Co-authored-by: DonnchaC <DonnchaC@users.noreply.github.com>

mvt/ios/data/ios_versions.json

@@ -883,6 +883,10 @@
         "version": "15.8",
         "build": "19H370"
     },
+    {
+        "version": "15.8.1",
+        "build": "19H380"
+    },
     {
         "build": "20A362",
         "version": "16.0"
@@ -968,6 +972,10 @@
         "version": "16.7.4",
         "build": "20H240"
     },
+    {
+        "version": "16.7.5",
+        "build": "20H307"
+    },
     {
         "version": "17.0",
         "build": "21A327"
@@ -1015,5 +1023,9 @@
     {
         "version": "17.2.1",
         "build": "21C66"
+    },
+    {
+        "version": "17.3",
+        "build": "21D50"
     }
 ]