misc: Updated the RELEASE-NOTES and version number

Updated the RELEASE-NOTES.md and version number for the v20.1.0.5 hotfix

Change-Id: I137a12325137799b9b1f98fe67ac55bfab49cd91
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/43145
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 3f17091..7c3472e 100644
@@ -1,3 +1,11 @@
+# Version
+**[HOTFIX]** This hotfix release fixes three known bugs:
+* `src/python/m5/util/convert.py` incorrectly stated kibibytes as 'kiB' instead of 'KiB'. This has been fixed.
+* Atomic accesses were not checking the access permission bits in the page table descriptors. They were incorrectly using the nature of the request itself. This is now fixed.
+* `num_l2chaches_per_cluster` and `num_cpus_per_cluster` were cast to floats in `configs/ruby/MESI_Three_Level_HTM.py`, which caused errors. This has been fixed so they are correctly cast to integers.
 # Version
 **[HOTFIX]** [gem5 was failing to build with SCons 4.0.1 and 4.1.0](https://gem5.atlassian.net/browse/GEM5-916).
diff --git a/src/Doxyfile b/src/Doxyfile
index 4ad0ea5..c9f1ed4 100644
--- a/src/Doxyfile
+++ b/src/Doxyfile
@@ -31,7 +31,7 @@
 # This could be handy for archiving the generated documentation or 
 # if some version control system is used.
-PROJECT_NUMBER         = v20.1.0.4
+PROJECT_NUMBER         = v20.1.0.5
 # The OUTPUT_DIRECTORY tag is used to specify the (relative or absolute) 
 # base path where the generated documentation will be put. 
diff --git a/src/base/version.cc b/src/base/version.cc
index 0a34488..3e7aa35 100644
--- a/src/base/version.cc
+++ b/src/base/version.cc
@@ -29,4 +29,4 @@
  * @ingroup api_base_utils
-const char *gem5Version = "";
+const char *gem5Version = "";