fix(docs): replace Docsy alert shortcode with Relearn notice

The docs site uses the hugo-theme-relearn theme, which provides
`notice` instead of Docsy's `alert`. The face-recognition,
voice-recognition, and stores feature pages used `{{% alert %}}`,
breaking `hugo build` with "template for shortcode \"alert\" not
found".

Assisted-by: Claude:claude-opus-4-7 [Claude Code]
Signed-off-by: Ettore Di Giacinto <mudler@localai.io>

docs/content/features/face-recognition.md

@@ -102,13 +102,13 @@ stand up.
     # → 204 No Content
     ```
 
-{{% alert icon="⚠️" color="warning" %}}
+{{% notice warning %}}
 **Storage caveat.** The default vector store is in-memory. All
 registered faces are lost when LocalAI restarts. Persistent storage
 (pgvector) is a tracked future enhancement — the face-recognition HTTP
 API is designed to swap the backing store without changing the wire
 format.
-{{% /alert %}}
+{{% /notice %}}
 
 ## API reference
 
@@ -256,13 +256,13 @@ only listed the face recognition weights), the request returns a gRPC
 `is_real=false`. Re-install the gallery entry or point the backend at a
 model that bundles the MiniFASNet ONNX files.
 
-{{% alert icon="ℹ" color="info" %}}
+{{% notice info %}}
 The MiniFASNet score is best at catching **printed photos and screen
 replays**. Deepfake videos and high-quality prosthetics are out of
 scope — liveness here is a low-cost first line of defence, not a
 guarantee. For higher assurance, combine with challenge-response (e.g.
 ask the user to turn their head).
-{{% /alert %}}
+{{% /notice %}}
 
 ## Choosing an engine
 

docs/content/features/stores.md

@@ -9,13 +9,13 @@ url = '/stores'
 Stores are an experimental feature to help with querying data using similarity search. It is
 a low level API that consists of only `get`, `set`, `delete` and `find`.
 
-{{% alert icon="💡" color="info" %}}
+{{% notice tip %}}
 **Face recognition uses this store.** The 1:N face identification flow
 (`/v1/face/register`, `/v1/face/identify`, `/v1/face/forget`) is built
 on top of the generic store — see
 [Face Recognition](/features/face-recognition/) for the face-oriented
 API.
-{{% /alert %}}
+{{% /notice %}}
 
 For example if you have an embedding of some text and want to find text with similar embeddings.
 You can create embeddings for chunks of all your text then compare them against the embedding of the text you

docs/content/features/voice-recognition.md

@@ -99,13 +99,13 @@ hood.
     # → 204 No Content
     ```
 
-{{% alert icon="⚠️" color="warning" %}}
+{{% notice warning %}}
 **Storage caveat.** The default vector store is in-memory. All
 registered speakers are lost when LocalAI restarts. Persistent storage
 (pgvector) is a tracked future enhancement shared with face
 recognition — the voice-recognition HTTP API is designed to swap the
 backing store without changing the wire format.
-{{% /alert %}}
+{{% /notice %}}
 
 ## API reference