feat(km): add available algorithms (#5412)

Author: bene2k1

pages/key-manager/how-to/create-km-key.mdx

@@ -22,11 +22,10 @@ Scaleway's Key Manager allows you to create key encryption keys from the [Scalew
 2. Click **+ Create key**.
 3. Choose the region in which you want to create your key.
 4. Enter a name, a description, and optional tags for your key.
-5. Select the [encryption method](/key-manager/concepts/#encryption-method) for your key.
-
-    <Message type="important">
-     Key Manager currently only supports the `AES-256 GCM` [symmetric encryption](/key-manager/concepts/#symmetric-encryption) algorithm.
-    </Message>
+5. Select the [encryption method](/key-manager/concepts/#encryption-method) for your key. Key Manager supports:
+    * [Symmetric encryption](/key-manager/concepts/#symmetric-encryption) using the `AES-256 CGM` algorithm
+    * [Asymmetric encryption](/key-manager/concepts/#asymmetric-encryption) using the `RSA_OAEP_2048_SHA256`, `RSA_OAEP_3072_SHA256` (recommended), or `RSA_OAEP_4096_SHA256` algorithms.
+    * [Asymmetric signature](/key-manager/concepts/#signature) using the `EC_P256_SHA` (recommended), `EC_P384_SHA384`, `RSA_PKCS1_2048_SHA256`, `RSA_PCKS1_3073_SHA256`, `PSA_PKCS1_4096_SHA256`, `RSA_PSSS_2048_SHA256`, `RSA_PSS_3072_SHA256`, and `RSA_PSS_4096_SHA256` algorithms.
 6. Switch the <Icon name="toggle" /> icon to disable [key protection](/key-manager/concepts/#key-protection) or leave it enabled.
     <Message type="note">
      Key protection allows you to protect your key from accidental deletion.