Update IBM Plex Mono to 2.004 (v6.4.0)

Signed-off-by: Fini Jastrow <ulf.fini.jastrow@desy.de>

bin/scripts/lib/fonts.json

@@ -107,7 +107,7 @@
     {
       "unpatchedName": "IBM Plex Mono",
       "RFN": true,
-      "version": "2.3",
+      "version": "2.004 (6.4.0)",
       "patchedName": "BlexMono",
       "folderName": "IBMPlexMono",
       "imagePreviewFont": "BlexMono Nerd Font",

readme.md

@@ -120,7 +120,7 @@ A preview of all fonts can be found [here](https://www.nerdfonts.com/font-downlo
 | [AurulentSansMono Nerd Font][p-aurulent]          | Aurulent Sans Mono (Stephen G. Hartke) |            | NO   |
 | [BigBlueTerminal Nerd Font][p-bigblueterm]        | BigBlueTerminal (VileR)                |            | NO   |
 | [BitstromWera Nerd Font][p-bitstream]             | Vera Sans Mono (Bitstream Inc)         | 1.1        | YES  |
-| [BlexMono Nerd Font][p-blex]                      | [IBM Plex Mono][f-ibm-plex]            | 2.3        | YES  |
+| [BlexMono Nerd Font][p-blex]                      | [IBM Plex Mono][f-ibm-plex]            | 2.004      | YES  |
 | [CaskaydiaCove Nerd Font][p-cascadia]             | [Cascadia Code][f-cascadia]            | 2111.01    | YES  |
 | [CaskaydiaMono Nerd Font][p-cascadia-mono]        | [Cascadia Mono][f-cascadia]            | 2111.01    | YES  |
 | [CodeNewRoman Nerd Font][p-code-nr]               | Code New Roman (Sam Radian)            | 2.0        | NO   |

src/unpatched-fonts/IBMPlexMono/README.md

@@ -4,4 +4,4 @@ The package of IBM’s typeface, IBM Plex.
 
 For more information have a look at the upstream website: https://github.com/IBM/plex
 
-Version: 2.3
+Version: 2.004 (Release v6.4.0)