use explicit commit instead of branch

Author: ibotty

sha-crypt/Cargo.toml

@@ -21,7 +21,7 @@ sha2 = { version = "0.10", default-features = false }
 # optional dependencies
 rand = { version = "0.8", optional = true }
 subtle = { version = ">=2, <2.5", optional = true, default-features = false }
-base64ct = { git = "https://github.com/ibotty/rustcrypto-formats", branch = "shacrypt" }
+base64ct = { git = "https://github.com/ibotty/rustcrypto-formats", rev = "c0df69f7028cba1016018d7a57a89fb95cd22f83" }
 
 [features]
 default = ["simple"]