feat(SignaturePad): remove css isolation (#4392)

Author: ArgoZhang

src/BootstrapBlazor.Server/BootstrapBlazor.Server.csproj

@@ -57,7 +57,7 @@
     <PackageReference Include="BootstrapBlazor.OnScreenKeyboard" Version="8.0.4" />
     <PackageReference Include="BootstrapBlazor.PdfReader" Version="8.0.4" />
     <PackageReference Include="BootstrapBlazor.Player" Version="8.0.0-beta05" />
-    <PackageReference Include="BootstrapBlazor.SignaturePad" Version="8.0.2" />
+    <PackageReference Include="BootstrapBlazor.SignaturePad" Version="8.0.3" />
     <PackageReference Include="BootstrapBlazor.Sortable" Version="8.0.6" />
     <PackageReference Include="BootstrapBlazor.Splitting" Version="8.0.0" />
     <PackageReference Include="BootstrapBlazor.SvgEditor" Version="8.1.0" />