update noVNC ref, add bitrate setting to yaml config

.gitmodules

@@ -1,7 +1,7 @@
 [submodule "kasmweb"]
 	path = kasmweb
 	url = https://github.com/kasmtech/noVNC.git
-	branch = master
+	branch = video2
 [submodule "kasmvnc-functional-tests"]
 	path = kasmvnc-functional-tests
 	url = git@gitlab.com:kasm-technologies/internal/kasmvnc-functional-tests.git

unix/kasmvnc_defaults.yaml

@@ -130,6 +130,7 @@ encoding:
       level: off
     scaling_algorithm: progressive_bilinear
     webp_encoding_time: 30
+    bitrate: 300
 
   compare_framebuffer: auto
   zrle_zlib_level: auto

unix/vncserver

@@ -2097,6 +2097,15 @@ sub DefineConfigToCLIConversion {
           })
         ]
     }),
+    KasmVNC::CliOption->new({
+        name => 'VideoBitRate',
+        configKeys => [
+          KasmVNC::ConfigKey->new({
+            name => "encoding.video_encoding_mode.bitrate",
+            type => KasmVNC::ConfigKey::INT
+          })
+        ]
+    }),
     KasmVNC::CliOption->new({
         name => 'CompareFB',
         configKeys => [