Bump ExpressionTreeToString

Bumps [ExpressionTreeToString](https://github.com/zspitz/ExpressionTreeToString) from 3.2.54 to 3.4.71.
- [Release notes](https://github.com/zspitz/ExpressionTreeToString/releases)
- [Commits](https://github.com/zspitz/ExpressionTreeToString/commits)

---
updated-dependencies:
- dependency-name: ExpressionTreeToString
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

samples/snippets/visualbasic/programming-guide/dynamic-linq-expression-trees/dynamic-linq-expression-trees.vbproj

@@ -7,7 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ExpressionTreeToString" Version="3.2.54" />
+    <PackageReference Include="ExpressionTreeToString" Version="3.4.71" />
     <PackageReference Include="LinqKit.Core" Version="1.2.2" />
     <PackageReference Include="System.Linq.Dynamic.Core" Version="1.2.7" />
   </ItemGroup>