SLES - Updates (#454)

* SLES - Updates

* Updates

* Cleanup

* Update CHANGELOG.md

Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com>

* CXX Compiler - Use AMD Clang++

* Docs - Updates

* ROCm Version - Upgraded to 6.3.0

* Readme - cleanup

* Readme - minor updates

* Readme - Fix note

---------

Co-authored-by: spolifroni-amd <Sandra.Polifroni@amd.com>

[ROCm/rocdecode commit: 6339767b4c]

projects/rocdecode/api/rocdecode_version.h

@@ -35,7 +35,7 @@ extern "C" {
 #endif
 /* NOTE: Match version with CMakeLists.txt */
 #define ROCDECODE_MAJOR_VERSION 0
-#define ROCDECODE_MINOR_VERSION 8
+#define ROCDECODE_MINOR_VERSION 9
 #define ROCDECODE_MICRO_VERSION 0