Rename --bit-rate to --video-bit-rate

This prepares the introduction of --audio-bit-rate.

PR #3757 <https://github.com/Genymobile/scrcpy/pull/3757>

app/data/bash-completion/scrcpy

@@ -2,7 +2,7 @@ _scrcpy() {
     local cur prev words cword
     local opts="
         --always-on-top
-        -b --bit-rate=
+        -b --video-bit-rate=
         --codec-options=
         --crop=
         -d --select-usb
@@ -104,7 +104,7 @@ _scrcpy() {
             COMPREPLY=($(compgen -W "$("${ADB:-adb}" devices | awk '$2 == "device" {print $1}')" -- ${cur}))
             return
             ;;
-        -b|--bit-rate \
+        -b|--video-bit-rate \
         |--codec-options \
         |--crop \
         |--display \

app/data/zsh-completion/_scrcpy

@@ -9,7 +9,7 @@ local arguments
 
 arguments=(
     '--always-on-top[Make scrcpy window always on top \(above other windows\)]'
-    {-b,--bit-rate=}'[Encode the video at the given bit-rate]'
+    {-b,--video-bit-rate=}'[Encode the video at the given bit-rate]'
     '--codec-options=[Set a list of comma-separated key\:type=value options for the device encoder]'
     '--crop=[\[width\:height\:x\:y\] Crop the device screen on the server]'
     {-d,--select-usb}'[Use USB device]'