Fix simplelogin auth (#486)

## Type of change
```
- [x] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other
```

## Objective
Simplelogin was using the bearer Authorization header while it was
supposed to use non-standard Authentication

crates/bitwarden/src/tool/generators/username_forwarders/simplelogin.rs

@@ -31,7 +31,7 @@ async fn generate_with_api_url(
     let response = http
         .post(format!("{api_url}/api/alias/random/new{query}"))
         .header(CONTENT_TYPE, "application/json")
-        .bearer_auth(api_key)
+        .header("Authentication", api_key)
         .json(&Request { note })
         .send()
         .await?;
@@ -65,7 +65,7 @@ mod tests {
                 .and(matchers::method("POST"))
                 .and(matchers::query_param("hostname", "example.com"))
                 .and(matchers::header("Content-Type", "application/json"))
-                .and(matchers::header("Authorization", "Bearer MY_TOKEN"))
+                .and(matchers::header("Authentication", "MY_TOKEN"))
                 .and(matchers::body_json(json!({
                     "note": "Website: example.com. Generated by Bitwarden."
                 })))
@@ -78,7 +78,7 @@ mod tests {
                 .and(matchers::method("POST"))
                 .and(matchers::query_param("hostname", "example.com"))
                 .and(matchers::header("Content-Type", "application/json"))
-                .and(matchers::header("Authorization", "Bearer MY_FAKE_TOKEN"))
+                .and(matchers::header("Authentication", "MY_FAKE_TOKEN"))
                 .and(matchers::body_json(json!({
                     "note": "Website: example.com. Generated by Bitwarden."
                 })))