Optionally use the PAT_GITHUB token to checkout skia-experimental

skia/dependencies/make_skia_wasm.sh

diff --git a/skia/dependencies/make_skia_wasm.sh b/skia/dependencies/make_skia_wasm.sh
old mode 100755
new mode 100644
index 29576ba..fc4a2e7
--- a/skia/dependencies/make_skia_wasm.sh
+++ b/skia/dependencies/make_skia_wasm.sh
@@ -8,7 +8,12 @@
 #   https://skia.org/user/build
 # GLFW requires CMake
 
-./get_skia.sh git@github.com:rive-app/skia-experimental.git main skia-experimental
+if [ -z "${PAT_GITHUB}" ]; then
+    SKIA_EXPERIMENTAL_URL=https://${PAT_GITHUB}@github.com/rive-app/skia-experimental.git
+else
+    SKIA_EXPERIMENTAL_URL=git@github.com:rive-app/skia-experimental.git
+fi
+./get_skia.sh ${SKIA_EXPERIMENTAL_URL} main skia-experimental
 
 cd skia-experimental