Update cameraSensors.db with Pixel 8 and Pixel 8 Pro

https://www.dpreview.com/reviews/google-pixel-8-pixel-8-pro-review-two-top-smartphones-for-photography

Author: heyvian

src/aliceVision/sensorDB/cameraSensors.db

@@ -2209,6 +2209,8 @@ Google;Pixel 6 Pro;9.79;usercontribution
 Google;Pixel 6a;5.64;usercontribution
 Google;Pixel 7;9.79;usercontribution
 Google;Pixel 7 Pro;9.79;usercontribution
+Google;Pixel 8;9.8;dpreview
+Google;Pixel 8 Pro;9.8;dpreview
 GoPro;GoPro Fusion;6.17;dpreview
 GoPro;GoPro Hero 2018;6.17;dpreview
 GoPro;GoPro Hero3-Silver Edition;5.37;usercontribution