Bump System.Text.Encodings.Web in /src/Lithnet.Laps.Web/Lithnet.Laps.Web

Bumps [System.Text.Encodings.Web](https://github.com/dotnet/corefx) from 4.4.0 to 4.5.1.
- [Release notes](https://github.com/dotnet/corefx/releases)
- [Commits](https://github.com/dotnet/corefx/commits)

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

Author: dependabot[bot]

src/Lithnet.Laps.Web/Lithnet.Laps.Web/packages.config

@@ -46,7 +46,7 @@
   <package id="System.Security.Cryptography.Encoding" version="4.3.0" targetFramework="net461" />
   <package id="System.Security.Cryptography.Primitives" version="4.3.0" targetFramework="net461" />
   <package id="System.Security.Cryptography.X509Certificates" version="4.3.0" targetFramework="net461" />
-  <package id="System.Text.Encodings.Web" version="4.4.0" targetFramework="net461" />
+  <package id="System.Text.Encodings.Web" version="4.5.1" targetFramework="net461" />
   <package id="System.ValueTuple" version="4.5.0" targetFramework="net461" />
   <package id="WebGrease" version="1.6.0" targetFramework="net461" />
 </packages>