pin .net sdk version

Build/Azure/pipelines/templates/build-job.yml

@@ -17,7 +17,7 @@ jobs:
     displayName: 'Install .NET'
     inputs:
       packageType: sdk
-      version: 7.x
+      version: 7.0.203
 
   - task: PowerShell@2
     inputs:

Build/Azure/pipelines/templates/test-workflow-linux.yml

@@ -22,7 +22,7 @@ steps:
   displayName: 'Install .NET 7'
   inputs:
     packageType: sdk
-    version: 7.x
+    version: 7.0.203
   condition: and(variables.title, succeeded())
 
 - task: CmdLine@2

Build/Azure/pipelines/templates/test-workflow-macos.yml

@@ -22,7 +22,7 @@ steps:
   displayName: 'Install .NET 7'
   inputs:
     packageType: sdk
-    version: 7.x
+    version: 7.0.203
   condition: and(variables.title, succeeded())
 
 - task: CmdLine@2

Build/Azure/pipelines/templates/test-workflow-windows.yml

@@ -31,7 +31,7 @@ steps:
   displayName: 'Install .NET 7 (x86)'
   inputs:
     packageType: sdk
-    version: 7.x
+    version: 7.0.203
   condition: and(variables.title, eq(variables.net70, 'true'), eq(variables.x86, 'true'), succeeded())
   env:
     PROCESSOR_ARCHITECTURE: x86
@@ -40,7 +40,7 @@ steps:
   displayName: 'Install .NET 7'
   inputs:
     packageType: sdk
-    version: 7.x
+    version: 7.0.203
   condition: and(variables.title, succeeded())
 
 - task: CmdLine@2