OS X: fix github workflow with updated icu4c library

By-default icu4c library version was hardcoded to v74. It appears, that
the updated version number is greater than that. This fix makes the
version number lookup more flexible. As soon as it's the only version in
the path (apparently there should only be one icu4c library QLog links
against).

.github/workflows/macOSBuild.yml

@@ -51,16 +51,19 @@ jobs:
      - name: Build dmg
        run: |
          cd build
+         ICU4C_LIB_PATH="$(brew --prefix icu4c)/lib"
+         ICU4C_LIB_NAME="$(ls ${ICU4C_LIB_PATH} | grep -E '^libicui18n\.[0-9]+\.dylib$')"
+         ICU4C_LIB="${ICU4C_LIB_PATH}/${ICU4C_LIB_NAME}"
          macdeployqt qlog.app -executable=./qlog.app/Contents/MacOS/qlog
          cp `brew --prefix`/lib/libhamlib.dylib qlog.app/Contents/Frameworks/libhamlib.dylib
          cp `brew --prefix`/lib/libqt6keychain.dylib qlog.app/Contents/Frameworks/libqt6keychain.dylib
          cp `brew --prefix`/lib/libdbus-1.dylib qlog.app/Contents/Frameworks/libdbus-1.dylib
          cp `brew --prefix brotli`/lib/libbrotlicommon.1.dylib qlog.app/Contents/Frameworks/libbrotlicommon.1.dylib
-         cp `brew --prefix`/opt/icu4c/lib/libicui18n.74.dylib qlog.app/Contents/Frameworks/libicui18n.74.dylib
+         cp ${ICU4C_LIB} qlog.app/Contents/Frameworks/${ICU4C_LIB_NAME}
          install_name_tool -change `brew --prefix`/lib/libhamlib.dylib @executable_path/../Frameworks/libhamlib.dylib qlog.app/Contents/MacOS/qlog
          install_name_tool -change `brew --prefix`/lib/libqt6keychain.dylib @executable_path/../Frameworks/libqt6keychain.dylib qlog.app/Contents/MacOS/qlog
          install_name_tool -change @loader_path/libbrotlicommon.1.dylib @executable_path/../Frameworks/libbrotlicommon.1.dylib qlog.app/Contents/MacOS/qlog 
-         install_name_tool -change /usr/local/opt/icu4c/lib/libicui18n.74.dylib @executable_path/../Frameworks/libicui18n.74.dylib qlog.app/Contents/MacOS/qlog
+         install_name_tool -change ${ICU4C_LIB} @executable_path/../Frameworks/${ICU4C_LIB_NAME} qlog.app/Contents/MacOS/qlog
          otool -L qlog.app/Contents/MacOS/qlog
          macdeployqt qlog.app -dmg
      - name: Copy artifact