fix double alt text

Author: tfitzmac

articles/azure-resource-manager/templates/syntax.md

@@ -318,7 +318,7 @@ For inline comments, you can use either `//` or `/* ... */`. In Visual Studio Co
 
 In Visual Studio Code, the [Azure Resource Manager Tools extension](quickstart-create-templates-use-visual-studio-code.md) can automatically detect an ARM template and change the language mode. If you see **Azure Resource Manager Template** at the bottom-right corner of Visual Studio Code, you can use the inline comments. The inline comments are no longer marked as invalid.
 
-:::image type="content" alt-text="Visual Studio Code Azure Resource Manager template mode" alt-text="Visual Studio Code Azure Resource Manager template mode":::
+:::image type="content" source="./media/template-syntax/resource-manager-template-editor-mode.png" alt-text="Screenshot of Visual Studio Code in Azure Resource Manager template mode.":::
 
 In Bicep, see [comments](../bicep/file.md#comments).
 
@@ -350,7 +350,7 @@ For `parameters`, add a `metadata` object with a `description` property.
 
 When deploying the template through the portal, the text you provide in the description is automatically used as a tip for that parameter.
 
-:::image type="content" alt-text="Show parameter tip" alt-text="Show parameter tip":::
+:::image type="content" source="./media/template-syntax/show-parameter-tip.png" alt-text="Screenshot showing parameter tip in Azure portal.":::
 
 For `resources`, add a `comments` element or a `metadata` object. The following example shows both a `comments` element and a `metadata` object.
 
@@ -430,4 +430,4 @@ In Bicep, see [multi-line strings](../bicep/file.md#multi-line-strings).
 * For details about the functions you can use from within a template, see [ARM template functions](template-functions.md).
 * To combine several templates during deployment, see [Using linked and nested templates when deploying Azure resources](linked-templates.md).
 * For recommendations about creating templates, see [ARM template best practices](./best-practices.md).
-* For answers to common questions, see [Frequently asked questions about ARM templates](frequently-asked-questions.yml).
+* For answers to common questions, see [Frequently asked questions about ARM templates](frequently-asked-questions.yml).