Bump Nerdbank.Streams from 2.6.78 to 2.6.81 (#385)

Bumps [Nerdbank.Streams](https://github.com/AArnott/Nerdbank.Streams) from 2.6.78 to 2.6.81.
- [Release notes](https://github.com/AArnott/Nerdbank.Streams/releases)
- [Commits](dotnet/Nerdbank.Streams@v2.6.78...v2.6.81)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Directory.Build.targets

@@ -37,7 +37,7 @@
     <PackageReference Update="Snapper" Version="2.2.4" />
     <PackageReference Update="Xunit.SkippableFact" Version="1.4.13" />
     <PackageReference Update="System.IO.Pipelines" Version="4.7.2" />
-    <PackageReference Update="Nerdbank.Streams" Version="2.6.78" />
+    <PackageReference Update="Nerdbank.Streams" Version="2.6.81" />
     <PackageReference Update="CodeGeneration.Roslyn.Attributes" Version="0.7.63" PrivateAssets="all" />
     <PackageReference Update="CodeGeneration.Roslyn.Engine" Version="0.7.63" />
     <PackageReference Update="CodeGeneration.Roslyn.Tool" Version="0.7.63" PrivateAssets="all" />

benchmarks/Pipeline/Pipeline.csproj

@@ -10,7 +10,7 @@
         <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
         <PackageReference Include="System.IO.Pipelines" Version="4.7.2" />
         <PackageReference Include="BenchmarkDotNet" Version="0.12.1" />
-        <PackageReference Include="Nerdbank.Streams" Version="2.6.78" />
+        <PackageReference Include="Nerdbank.Streams" Version="2.6.81" />
     </ItemGroup>
 
 </Project>

sample/SampleServer/SampleServer.csproj

@@ -21,7 +21,7 @@
         <PackageReference Include="System.Text.Encoding.Extensions" Version="4.3.0" />
         <PackageReference Include="System.Threading.Tasks" Version="4.3.0" />
         <PackageReference Include="System.IO.Pipelines" Version="4.7.2" />
-        <PackageReference Include="Nerdbank.Streams" Version="2.6.78" />
+        <PackageReference Include="Nerdbank.Streams" Version="2.6.81" />
     </ItemGroup>
 
 </Project>