unsafe: say "functions like syscall.Syscall", not only Syscall

Fixes #68301

Change-Id: I9d7f623370705ab2ad4c49489b5a89162467f22a
Reviewed-on: https://go-review.googlesource.com/c/go/+/596936
Commit-Queue: Ian Lance Taylor <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
Reviewed-by: Keith Randall <[email protected]>
Auto-Submit: Ian Lance Taylor <[email protected]>

Author: ianlancetaylor

src/unsafe/unsafe.go

@@ -110,7 +110,7 @@ type IntegerType int
 //	u := unsafe.Pointer(nil)
 //	p := unsafe.Pointer(uintptr(u) + offset)
 //
-// (4) Conversion of a Pointer to a uintptr when calling [syscall.Syscall].
+// (4) Conversion of a Pointer to a uintptr when calling functions like [syscall.Syscall].
 //
 // The Syscall functions in package syscall pass their uintptr arguments directly
 // to the operating system, which then may, depending on the details of the call,