[SIL.rst] Fix warning.
[SIL.rst] Fix warning.

glessard/swift,roambotics/swift,roambotics/swift,glessard/swift,glessard/swift,glessard/swift,apple/swift,apple/swift,apple/swift,apple/swift,glessard/swift,roambotics/swift,glessard/swift,roambotics/swift,roambotics/swift,apple/swift,apple/swift,roambotics/swift