[Docs] Update V1 doc to reflect whisper support (#24606)

Signed-off-by: Russell Bryant <rbryant@redhat.com>

docs/models/supported_models.md

@@ -766,7 +766,7 @@ Speech2Text models trained specifically for Automatic Speech Recognition.
 
 | Architecture | Models | Example HF Models | [LoRA](../features/lora.md) | [PP](../serving/parallelism_scaling.md) | [V1](gh-issue:8779) |
 |--------------|--------|-------------------|----------------------|---------------------------|---------------------|
-| `WhisperForConditionalGeneration` | Whisper | `openai/whisper-small`, `openai/whisper-large-v3-turbo`, etc. | | | |
+| `WhisperForConditionalGeneration` | Whisper | `openai/whisper-small`, `openai/whisper-large-v3-turbo`, etc. | | | ✅︎ |
 | `VoxtralForConditionalGeneration` | Voxtral (Mistral format) | `mistralai/Voxtral-Mini-3B-2507`, `mistralai/Voxtral-Small-24B-2507`, etc. | ✅︎ | ✅︎ | ✅︎ |
 | `Gemma3nForConditionalGeneration` | Gemma3n | `google/gemma-3n-E2B-it`, `google/gemma-3n-E4B-it`, etc. | | | ✅︎ |
 

docs/usage/v1_guide.md

@@ -83,7 +83,7 @@ based on assigned priority, with FCFS as a tie-breaker), configurable via the
 | Model Type                  | Status                                                                             |
 |-----------------------------|------------------------------------------------------------------------------------|
 | **Decoder-only Models**     | <nobr>🚀 Optimized</nobr>                                                          |
-| **Encoder-Decoder Models**  | <nobr>🟠 Delayed</nobr>                                                            |
+| **Encoder-Decoder Models**  | <nobr>🟢 Whisper only</nobr>                                                       |
 | **Embedding Models**        | <nobr>🟢 Functional</nobr>                                                         |
 | **Mamba Models**            | <nobr>🟢 (Mamba-2), 🟢 (Mamba-1)</nobr>                                            |
 | **Multimodal Models**       | <nobr>🟢 Functional</nobr>                                                         |
@@ -118,8 +118,9 @@ Please note that prefix caching is not yet supported for any of the above models
 
 #### Encoder-Decoder Models
 
-Models requiring cross-attention between separate encoder and decoder (e.g., `BartForConditionalGeneration`, `MllamaForConditionalGeneration`)
-are not yet supported.
+Whisper is supported. Other models requiring cross-attention between separate
+encoder and decoder (e.g., `BartForConditionalGeneration`,
+`MllamaForConditionalGeneration`) are not yet supported.
 
 ### Features