Safari 17.0: AV1 & unprefixed hyphens 🎉 (#6836)

* Update av1.json

* Update css-hyphens.json

features-json/av1.json

@@ -365,9 +365,9 @@
       "16.4":"n",
       "16.5":"n",
       "16.6":"n",
-      "17.0":"n",
-      "17.1":"n",
-      "TP":"n"
+      "17.0":"a #4",
+      "17.1":"a #4",
+      "TP":"a #4"
     },
     "opera":{
       "9":"n",
@@ -503,8 +503,8 @@
       "16.4":"n",
       "16.5":"n",
       "16.6":"n",
-      "17.0":"n",
-      "17.1":"n"
+      "17.0":"a #4",
+      "17.1":"a #4"
     },
     "op_mini":{
       "all":"n"
@@ -583,7 +583,8 @@
   "notes_by_num":{
     "1":"Can be enabled in Edge on Windows 10 or later by installing the [AV1 Video Extension from the Microsoft Store](https://www.microsoft.com/store/productId/9MVZQVXJBQ9V)",
     "2":"Firefox 65 only supported AV1 on Windows 64-bit",
-    "3":"Firefox 66 only supported AV1 on Windows and macOS"
+    "3":"Firefox 66 only supported AV1 on Windows and macOS",
+    "4":"Partial support refers to supporting only devices with hardware decoding support"
   },
   "usage_perc_y":69.29,
   "usage_perc_a":0,

features-json/css-hyphens.json

@@ -365,8 +365,8 @@
       "16.4":"y x",
       "16.5":"y x",
       "16.6":"y x",
-      "17.0":"y x",
-      "17.1":"y x",
+      "17.0":"y",
+      "17.1":"y",
       "TP":"y"
     },
     "opera":{
@@ -503,8 +503,8 @@
       "16.4":"y x",
       "16.5":"y x",
       "16.6":"y x",
-      "17.0":"y x",
-      "17.1":"y x"
+      "17.0":"y",
+      "17.1":"y"
     },
     "op_mini":{
       "all":"n"