Update HarfBuzz to 2.3.1

VERSIONS.txt

@@ -2,7 +2,7 @@
 ANGLE.WindowsStore      release     2.1.13
 mdoc.targets            release     5.7.4.3
 mdoc                    release     master
-harfbuzz                release     2.3.0
+harfbuzz                release     2.3.1
 skia                    release     m68
 xunit                   release     2.4.0
 xunit.runner.console    release     2.4.0
@@ -14,7 +14,7 @@ Cake                    release     0.31.0
 
 # native sonames
 libSkiaSharp            soname      68.1.0
-HarfBuzz                soname      0.20300.0
+HarfBuzz                soname      0.20310.0
 
 # SkiaSharp.dll
 SkiaSharp               assembly    1.68.0.0
@@ -22,7 +22,7 @@ SkiaSharp               file        1.68.1.0
 
 # HarfBuzzSharp.dll
 HarfBuzzSharp           assembly    1.0.0.0
-HarfBuzzSharp           file        2.3.0.0
+HarfBuzzSharp           file        2.3.1.0
 
 # nuget versions
 SkiaSharp                               nuget       1.68.1
@@ -30,5 +30,5 @@ SkiaSharp.NativeAssets.Linux            nuget       1.68.1
 SkiaSharp.Views                         nuget       1.68.1
 SkiaSharp.Views.Forms                   nuget       1.68.1
 SkiaSharp.HarfBuzz                      nuget       1.68.1
-HarfBuzzSharp                           nuget       2.3.0.0
-HarfBuzzSharp.NativeAssets.Linux        nuget       2.3.0.0
+HarfBuzzSharp                           nuget       2.3.1.0
+HarfBuzzSharp.NativeAssets.Linux        nuget       2.3.1.0

externals/harfbuzz

@@ -1 +1 @@
-Subproject commit b5c12b9f4d2c32a5013c340f7e40649cb5f2b41a
+Subproject commit 55d1d7c8bcd8d97c4e618e5dd21f13df50b10ce8