Fix assignment of member dismiss_

This patch fixes error:
    error: assignment of member 'dismiss_' in read-only object

Reported by kind Gentoo folks:
<https://bugs.gentoo.org/918709>

Change-Id: I7cc593043e97402afd85593c528ace86952b1350
Signed-off-by: Galantsev, Dmitrii <dmitrii.galantsev@amd.com>

include/rocm_smi/rocm_smi_utils.h

@@ -240,7 +240,7 @@ class ScopeGuard {
   __forceinline ~ScopeGuard() {
     if (!dismiss_) release_();
   }
-  __forceinline ScopeGuard& operator=(const ScopeGuard& rhs) {
+  __forceinline ScopeGuard& operator=(ScopeGuard& rhs) {
     dismiss_ = rhs.dismiss_;
     release_ = rhs.release_;
     rhs.dismiss_ = true;