FileConventions(.Test): fix proj file indent

Author: Mersho

src/FileConventions.Test/FileConventions.Test.fsproj

@@ -19,7 +19,7 @@
     <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="NUnit.Analyzers" Version="3.3.0" />
     <PackageReference Include="coverlet.collector" Version="3.1.2" />
-		<PackageReference Include="Fsdk" Version="0.6.0--date20230821-0702.git-5488853" />
+    <PackageReference Include="Fsdk" Version="0.6.0--date20230821-0702.git-5488853" />
   </ItemGroup>
 
   <ItemGroup>

src/FileConventions/FileConventions.fsproj

@@ -13,7 +13,7 @@
   <ItemGroup>
     <PackageReference Include="Mono.Posix" Version="7.1.0-final.1.21458.1" />
     <PackageReference Include="Mono.Unix" Version="7.1.0-final.1.21458.1" />
-		<PackageReference Include="Fsdk" Version="0.6.0--date20230821-0702.git-5488853" />
+    <PackageReference Include="Fsdk" Version="0.6.0--date20230821-0702.git-5488853" />
   </ItemGroup>
 
 </Project>