obs-ffmpeg: Add missing translable string for "Profile"

plugins/obs-ffmpeg/data/locale/en-US.ini

@@ -4,6 +4,7 @@ FFmpegOpus="FFmpeg Opus Encoder"
 Bitrate="Bitrate"
 MaxBitrate="Max Bitrate"
 Preset="Preset"
+Profile="Profile"
 RateControl="Rate Control"
 KeyframeIntervalSec="Keyframe Interval (seconds, 0=auto)"
 Lossless="Lossless"