Bump System.Text.RegularExpressions from 4.3.0 to 4.3.1

---
updated-dependencies:
- dependency-name: System.Text.RegularExpressions
  dependency-version: 4.3.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

BS-Specflow.csproj

@@ -17,6 +17,7 @@
     <PackageReference Include="SpecFlow" Version="3.9.40" />
     <PackageReference Include="SpecFlow.NUnit" Version="3.9.40" />
     <PackageReference Include="SpecFlow.Tools.MsBuild.Generation" Version="3.9.40" />
+  <PackageReference Include="System.Text.RegularExpressions" Version="4.3.1" />
   </ItemGroup>
 
 </Project>