🩹 Fix Node 16 deprecation warnings (for real)

It looks like the `setup-vulkan-sdk` action was responsible for the
Node 16 warnings, since it implicitly uses `actions/cache@v3`.
This updates the version to point to the new `@v2` tag to account
for the new version which no longer uses Node 16.

.github/actions/prepare-runner/action.yaml

@@ -78,7 +78,7 @@ runs:
     # Vulkan
 
     - name: Install Vulkan SDK
-      uses: bitwizeshift/setup-vulkan-sdk@v1.2.1
+      uses: bitwizeshift/setup-vulkan-sdk@v2
       if: runner.os == 'Linux' || runner.os == 'Windows'
       with:
         vulkan-query-version: 1.3.204.0