Update iree-requirements-ci.txt to 20240918.1020 (iree-org#153)

ci(iree): update version

to release 20240918.1020

This update is required for another PR
iree-org#123

Signed-off-by: Christopher McGirr <mcgirr@roofline.ai>
Signed-off-by: Ian <ian.nordeng@amd.com>

iree-requirements-ci.txt

@@ -3,5 +3,5 @@
 # more forgiving on the exact version.
 
 --find-links https://iree.dev/pip-release-links.html
-iree-compiler==20240913.1015
-iree_runtime==20240913.1015
+iree-compiler==20240918.1020
+iree_runtime==20240918.1020