hash/crc32: fix typo in arm64 archInitCastagnoli panic message

Change-Id: I5291216d5416eccd5a67b45b2f32cf2932b3747f
Reviewed-on: https://go-review.googlesource.com/c/go/+/407974
Reviewed-by: Dmitri Shuralyov <[email protected]>
Run-TryBot: Tobias Klauser <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
TryBot-Result: Gopher Robot <[email protected]>

Author: tklauser

src/hash/crc32/crc32_arm64.go

@@ -19,7 +19,7 @@ func archAvailableCastagnoli() bool {
 
 func archInitCastagnoli() {
 	if !cpu.ARM64.HasCRC32 {
-		panic("arch-specific crc32 instruction for Catagnoli not available")
+		panic("arch-specific crc32 instruction for Castagnoli not available")
 	}
 }