fix CI (hopefully)

.github/actions/save-raptor-build-cache/action.yml

@@ -0,0 +1,16 @@
+name: Save Raptor Build Cache
+description: Save the raptor build directory after a successful incremental build.
+
+inputs:
+  key:
+    description: Cache key used to save the build directory.
+    required: true
+
+runs:
+  using: composite
+  steps:
+    - name: Save raptor build cache
+      uses: actions/cache/save@v4
+      with:
+        path: build
+        key: ${{ inputs.key }}