fix

Author: DmitriyMusatkin

.gitmodules

@@ -30,7 +30,7 @@
 	url = https://github.com/awslabs/aws-checksums.git
 [submodule "crt/aws-c-s3"]
 	path = crt/aws-c-s3
-	url = git@github.com:awslabs/aws-c-s3.git
+	url = https://github.com/awslabs/aws-c-s3.git
 [submodule "aws-lc"]
 	path = crt/aws-lc
 	url = https://github.com/awslabs/aws-lc.git