update rustc-build-sysroot for dealing with unexpected_cfgs

Author: RalfJung

Cargo.lock

@@ -2219,7 +2219,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c2a198fb6b0eada2a8df47933734e6d35d350665a33a3593d7164fa52c75c19"
 dependencies = [
  "cfg-if",
- "windows-targets 0.52.4",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]
@@ -3424,9 +3424,9 @@ dependencies = [
 
 [[package]]
 name = "rustc-build-sysroot"
-version = "0.4.6"
+version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9bf37423495cd3a6a9ef8c75fc4566de0d26de0ab75f36f67a426e58df5768c"
+checksum = "ab1dbbd1bdf65fdac44c885f6cca147ba179108ce284b60a08ccc04b1f1dbac0"
 dependencies = [
  "anyhow",
  "rustc_version",