Update VERSION to 3.0.0 (#457)

* Update VERSION  and README to 3.0.0
* Update version mismatch of profiling data to a warning.

Signed-off-by: David Galiffi <David.Galiffi@amd.com>

[ROCm/rocprofiler-compute commit: 152eff0df1]

projects/rocprofiler-compute/src/utils/specs.py

@@ -93,7 +93,7 @@ def generate_machine_specs(args, sysinfo: dict = None):
             )
         version = get_version(config.rocprof_compute_home)["version"]
         if sysinfo_ver != version[: version.find(".")]:
-            console_error(
+            console_warning(
                 "Detected mismatch in sysinfo versioning. You need to reprofile to update data."
             )
         return MachineSpecs(**sysinfo)