Rectified date issues

Author: timayabi2020

scripts/FileCopy.ps1

@@ -95,7 +95,7 @@ function Copy-Files{
 
 Set-Location microsoftgraph-docs-powershell
 $date = Get-Date -Format "dd-MM-yyyy"
-$proposedBranch = "weekly_v2_docs_update_"+$date
+$proposedBranch = "weekly_v2_docs_update_$date"
 $exists = git branch -l $proposedBranch
 if ([string]::IsNullOrEmpty($exists)) {
     git checkout -b $proposedBranch