Add missing opus as supported extension in audio file module

Signed-off-by: falkTX <falktx@falktx.com>

carla

@@ -1 +1 @@
-Subproject commit 6ee03336ab0a15dba4da78dbf7413624228c5db5
+Subproject commit b8fa8f2faa42f69f6093a03fafb86b374ed46145

plugins/Cardinal/src/AudioFile.cpp

@@ -472,7 +472,7 @@ struct AudioFileListWidget : ImGuiWidget {
 
         static constexpr const char* const supportedExtensions[] = {
        #ifdef HAVE_SNDFILE
-            ".aif",".aifc",".aiff",".au",".bwf",".flac",".htk",".iff",".mat4",".mat5",".oga",".ogg",
+            ".aif",".aifc",".aiff",".au",".bwf",".flac",".htk",".iff",".mat4",".mat5",".oga",".ogg",".opus",
             ".paf",".pvf",".pvf5",".sd2",".sf",".snd",".svx",".vcc",".w64",".wav",".xi",
        #endif
             ".mp3"