Update requirements.txt

Upgrade torchrec version to 1.2.0 from 1.1.0

Author: isururanawaka

.ci/docker/requirements.txt

@@ -68,5 +68,5 @@ pycocotools
 semilearn==0.3.2
 torchao==0.10.0
 segment_anything==1.0
-torchrec==1.1.0; platform_system == "Linux"
+torchrec==1.2.0; platform_system == "Linux"
 fbgemm-gpu==1.2.0; platform_system == "Linux"