Merge branch 'bump-macos-dependencies' into 'master'

Use prebuilt macOS dependencies with fixed SDL and OSG 3.6

Closes #5939

See merge request OpenMW/openmw!804

(cherry picked from commit 74612b1286330b1e34a9c37528502770496e5bba)

9aaca972 Use prebuilt macOS dependencies with fixed SDL and OSG 3.6

CI/before_install.osx.sh

@@ -15,5 +15,5 @@ ccache --version
 cmake --version
 qmake --version
 
-curl -fSL -R -J https://downloads.openmw.org/osx/dependencies/openmw-deps-f8918dd.zip -o ~/openmw-deps.zip
+curl -fSL -R -J https://downloads.openmw.org/osx/dependencies/openmw-deps-8f5ef6e.zip -o ~/openmw-deps.zip
 unzip -o ~/openmw-deps.zip -d /private/tmp/openmw-deps > /dev/null