remove double slashes from $uri

bot.ps1

@@ -1,5 +1,5 @@
 #alternatively read params from $env
-#for more flexible Dockerifle support
+#for more flexible Dockerfile support
 param (
     [ValidateNotNullOrEmpty()]
     [uri]
@@ -40,7 +40,7 @@ function Send-MatrixEvent {
     #txn_id should be unique per client, so we use timestamp+random
     $txn_id = '{0}{1}' -f (Get-Date -UFormat '%s'),(Get-Random)
 
-    $uri = '{0}/_matrix/client/r0/rooms/{1}/send/{2}/{3}' -f $HomeServer,$RoomId,$EventType,$txn_id
+    $uri = '{0}_matrix/client/r0/rooms/{1}/send/{2}/{3}' -f $HomeServer,$RoomId,$EventType,$txn_id
 
     $header_splat = @{
         Authentication = 'Bearer'
@@ -211,7 +211,7 @@ function Join-MatrixRoom {
         $RoomId
     )
 
-    $uri = '{0}/_matrix/client/r0/rooms/{1}/join' -f $HomeServer,$RoomId
+    $uri = '{0}_matrix/client/r0/rooms/{1}/join' -f $HomeServer,$RoomId
 
     $header_splat = @{
         Authentication = 'Bearer'
@@ -237,7 +237,7 @@ function Get-MatrixAccountData {
         $Type
     )
 
-    $uri = '{0}/_matrix/client/r0/user/{1}/account_data/{2}' -f $HomeServer,$UserId,$Type
+    $uri = '{0}_matrix/client/r0/user/{1}/account_data/{2}' -f $HomeServer,$UserId,$Type
 
     $header_splat = @{
         Authentication = 'Bearer'
@@ -263,7 +263,7 @@ function Set-MatrixAccountData {
         $Content
     )
 
-    $uri = '{0}/_matrix/client/r0/user/{1}/account_data/{2}' -f $HomeServer,$UserId,$Type
+    $uri = '{0}_matrix/client/r0/user/{1}/account_data/{2}' -f $HomeServer,$UserId,$Type
 
     $header_splat = @{
         Authentication = 'Bearer'
@@ -303,7 +303,7 @@ function Invoke-MatrixSync {
         $Timeout = 30000
     )
 
-    $uri = '{0}/_matrix/client/r0/sync?timeout={1}' -f $HomeServer,$Timeout
+    $uri = '{0}_matrix/client/r0/sync?timeout={1}' -f $HomeServer,$Timeout
     if($Token) {
         $uri += '&since={0}' -f $Token
     }
@@ -348,7 +348,7 @@ function Get-MatrixFilterId {
         $Filter
     )
 
-    $uri = '{0}/_matrix/client/r0/user/{1}/filter' -f $HomeServer,$UserId
+    $uri = '{0}_matrix/client/r0/user/{1}/filter' -f $HomeServer,$UserId
 
     $header_splat = @{
         Authentication = 'Bearer'