bump PropertyChanged.Fody to 3.2.8

This outdated dependency causes `dotnet build`, `dotnet pack` etc to fail

Author: JohnTheGr8

Flow.Launcher.Core/Flow.Launcher.Core.csproj

@@ -55,7 +55,7 @@
     <PackageReference Include="JetBrains.Annotations" Version="2019.1.3" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     <PackageReference Include="squirrel.windows" Version="1.5.2" />
-    <PackageReference Include="PropertyChanged.Fody" Version="2.2.4">
+    <PackageReference Include="PropertyChanged.Fody" Version="3.2.8">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

Flow.Launcher.Plugin/Flow.Launcher.Plugin.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
+<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
 
   <PropertyGroup>
     <TargetFramework>netcoreapp3.1</TargetFramework>
@@ -55,7 +55,7 @@
     <PackageReference Include="JetBrains.Annotations" Version="2019.1.3" />
     <PackageReference Include="Mono.Cecil" Version="0.11.2" />
     <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
-    <PackageReference Include="PropertyChanged.Fody" Version="2.2.4">
+    <PackageReference Include="PropertyChanged.Fody" Version="3.2.8">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

Flow.Launcher/Flow.Launcher.csproj

@@ -64,7 +64,7 @@
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="PropertyChanged.Fody" Version="2.2.4">
+    <PackageReference Include="PropertyChanged.Fody" Version="3.2.8">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>