fix(flux-local): split diff into multiple comments

.github/workflows/kube-flux-diff.yaml

@@ -47,7 +47,7 @@ jobs:
           readarray -d '' splitfiles < <(find ${{ matrix.path }}/${{ matrix.resource }} -type f -print0)
           IFS=$'%' echo "${splitfiles[*]}"
           for i in "${splitfiles[@]}"; do
-            cat <<EOF > "${i}"
+            cat <<\EOF > "${i}"
             ```diff
             $(cat "${i}")
             ```