Drop CBL Mariner 2.0 support for 3.x agents

Author: ivanduplenskikh

docs/pipelines/agents/v3-agent.md

@@ -9,7 +9,7 @@ ms.date: 06/30/2025
 # Agent software version 3
 
 > [!IMPORTANT]
-> Agent software version 3 (using .NET 6) is unsupported for Azure DevOps Services, and the Azure Pipelines team recommends you upgrade to [Agent software version 4](./v4-agent.md) (using .NET 8). 
+> Agent software version 3 (using .NET 6) is unsupported for Azure DevOps Services, and the Azure Pipelines team recommends you upgrade to [Agent software version 4](./v4-agent.md) (using .NET 8).
 >
 > To update your self-hosted agents to version 4, see [Upgrade to agent software version 4](./v4-agent.md#upgrade-to-4x-agent-on-supported-operating-systems).
 >
@@ -38,7 +38,6 @@ The following operating systems are supported by the 3.x agent.
       * No longer requires separate package
     * SUSE Enterprise Linux 12 SP2 or later
     * Ubuntu 22.04, 20.04, 18.04, 16.04
-    * Azure Linux 2.0
     * Oracle Linux 7 and higher
   * ARM64
     * Debian 10+
@@ -95,7 +94,7 @@ To resolve this error you can:
     jobs:
     - job: 'agentWithVariables'
       displayName: 'Agent with variables'
-    
+
       variables:
         AGENT_ACKNOWLEDGE_NO_UPDATES: 'true' # Required to not fail job on operating system that is not supported by .NET 6
     ```
@@ -128,7 +127,7 @@ You don't have to install .NET 6 on your agent machine before installing and con
 
 ### Do I have to build my code using .NET 6 if I'm using the 3.x agent?
 
-The version of .NET used to run the 3.x agent is self-contained in the agent installation, and isn't used to build your code. The version of .NET that is used to build your code depends on the pipeline and the version or versions of .NET you have installed onto your agent machine. 
+The version of .NET used to run the 3.x agent is self-contained in the agent installation, and isn't used to build your code. The version of .NET that is used to build your code depends on the pipeline and the version or versions of .NET you have installed onto your agent machine.
 
 ### I use Azure DevOps Server and not Azure DevOps Services. Does this change impact me?