(maint) Improve log message

The log message when trying to downgrade a program
shows a variety of switches, --force, --allow-downgrade
One of these is formatted as prose, side by side
Changed to reflect proper switch syntax.

src/chocolatey/infrastructure.app/services/NugetService.cs

@@ -464,7 +464,7 @@ public virtual ConcurrentDictionary<string, PackageResult> install_run(Chocolate
 
                 if (installedPackage != null && version != null && version < installedPackage.Version && !config.AllowMultipleVersions && !config.AllowDowngrade)
                 {
-                    string logMessage = "A newer version of {0} (v{1}) is already installed.{2} Use --allow-downgrade or --force to attempt to install older versions, or use side by side to allow multiple versions.".format_with(installedPackage.Id, installedPackage.Version, Environment.NewLine);
+                    string logMessage = "A newer version of {0} (v{1}) is already installed.{2} Use --allow-downgrade or --force to attempt to install older versions, or use --side-by-side to allow multiple versions.".format_with(installedPackage.Id, installedPackage.Version, Environment.NewLine);
                     var nullResult = packageInstalls.GetOrAdd(packageName, new PackageResult(installedPackage, _fileSystem.combine_paths(ApplicationParameters.PackagesLocation, installedPackage.Id)));
                     nullResult.Messages.Add(new ResultMessage(ResultType.Error, logMessage));
                     this.Log().Error(ChocolateyLoggers.Important, logMessage);
@@ -1637,4 +1637,4 @@ private void set_package_names_if_all_is_specified(ChocolateyConfiguration confi
             }
         }
     }
-}
+}