releasenote.md: use "None" for the empty list of new platforms

Having an empty table (with an additional empty line, compared
to non-empty ones) is really inconsistent.

* releasenote.md (microcode-20241112, microcode-20241029,
microcode-20240813, microcode-20240531, microcode-20240514,
microcode-20231114): Replace empty tables in the "New Platforms"
sub-section with "None".

Signed-off-by: Eugene Syromiatnikov <esyr@redhat.com>

Author: esyr-rh

releasenote.md

@@ -176,9 +176,7 @@
 
 ### New Platforms
 
-| Processor      | Stepping | F-M-S/PI    | Old Ver  | New Ver  | Products
-|:---------------|:---------|:------------|:---------|:---------|:---------
-
+None
 
 ### Updated Platforms
 
@@ -217,9 +215,7 @@
 
 ### New Platforms
 
-| Processor      | Stepping | F-M-S/PI    | Old Ver  | New Ver  | Products
-|:---------------|:---------|:------------|:---------|:---------|:---------
-
+None
 
 ### Updated Platforms
 
@@ -296,9 +292,7 @@
 
 ### New Platforms
 
-| Processor      | Stepping | F-M-S/PI    | Old Ver  | New Ver  | Products
-|:---------------|:---------|:------------|:---------|:---------|:---------
-
+None
 
 ### Updated Platforms
 
@@ -346,9 +340,7 @@
 
 ### New Platforms
 
-| Processor      | Stepping | F-M-S/PI    | Old Ver  | New Ver  | Products
-|:---------------|:---------|:------------|:---------|:---------|:---------
-
+None
 
 ### Updated Platforms
 
@@ -372,9 +364,7 @@
 
 ### New Platforms
 
-| Processor      | Stepping | F-M-S/PI    | Old Ver  | New Ver  | Products
-|:---------------|:---------|:------------|:---------|:---------|:---------
-
+None
 
 ### Updated Platforms
 
@@ -518,9 +508,7 @@
 
 ### New Platforms
 
-| Processor      | Stepping | F-M-S/PI    | Old Ver  | New Ver  | Products
-|:---------------|:---------|:------------|:---------|:---------|:---------
-
+None
 
 ### Updated Platforms