Update references from master to main (Azure#19471)

Co-authored-by: Wes Haggard <Wes.Haggard@microsoft.com>

eng/common/scripts/Verify-Links.ps1

@@ -27,7 +27,7 @@
   List of http status codes that count as broken links. Defaults to 400, 401, 404, SocketError.HostNotFound = 11001, SocketError.NoData = 11004.
 
   .PARAMETER branchReplaceRegex
-  Regex to check if the link needs to be replaced. E.g. ^(https://github.com/.*/(?:blob|tree)/)master(/.*)$
+  Regex to check if the link needs to be replaced. E.g. ^(https://github.com/.*/(?:blob|tree)/)main(/.*)$
 
   .PARAMETER branchReplacementName
   The substitute branch name or SHA commit.

eng/common/scripts/update-docs-metadata.ps1

@@ -67,10 +67,10 @@ function GetAdjustedReadmeContent($pkgInfo){
       $fileContent = $fileContent -replace $titleRegex, "`${0} - Version $($pkgInfo.PackageVersion) `n"
       $foundTitle = $matches["filetitle"]
     }
-    # Replace github master link with release tag.
+    # Replace github main link with release tag.
     $ReplacementPattern = "`${1}$($pkgInfo.Tag)"
     $fileContent = $fileContent -replace $releaseReplaceRegex, $ReplacementPattern
-  
+
     $header = "---`ntitle: $foundTitle`nkeywords: Azure, $Language, SDK, API, $($pkgInfo.PackageId), $service`nauthor: maggiepint`nms.author: magpint`nms.date: $date`nms.topic: article`nms.prod: azure`nms.technology: azure`nms.devlang: $Language`nms.service: $service`n---`n"
 
     if ($fileContent) {
@@ -101,7 +101,7 @@ foreach ($config in $targets) {
   if ($pkgsFiltered) {
     Write-Host "Given the visible artifacts, $($config.mode) Readme updates against $($config.path_to_config) will be processed for the following packages."
     Write-Host ($pkgsFiltered | % { $_.PackageId + " " + $_.PackageVersion })
-  
+
     foreach ($packageInfo in $pkgsFiltered) {
       $readmeName = "$($packageInfo.DocsReadMeName.ToLower())-readme${suffix}.md"
       $readmeFolder = Join-Path $DocRepoLocation $config.content_folder
@@ -115,12 +115,12 @@ foreach ($config in $targets) {
       if ($packageInfo.ReadmeContent) {
         $adjustedContent = GetAdjustedReadmeContent -pkgInfo $packageInfo
       }
-  
+
       if ($adjustedContent) {
         try {
           Push-Location $DocRepoLocation
           Set-Content -Path $readmeLocation -Value $adjustedContent -Force
-  
+
           Write-Host "Updated readme for $readmeName."
         } catch {
           Write-Host $_