Rename web vault version file

https://github.com/dani-garcia/bw_web_builds/pull/58

src/api/admin.rs

@@ -485,7 +485,7 @@ fn diagnostics(_token: AdminToken, ip_header: IpHeader, conn: DbConn) -> ApiResu
 
     // Get current running versions
     let web_vault_version: WebVaultVersion =
-        match read_file_string(&format!("{}/{}", CONFIG.web_vault_folder(), "bwrs-version.json")) {
+        match read_file_string(&format!("{}/{}", CONFIG.web_vault_folder(), "vw-version.json")) {
             Ok(s) => serde_json::from_str(&s)?,
             _ => match read_file_string(&format!("{}/{}", CONFIG.web_vault_folder(), "version.json")) {
                 Ok(s) => serde_json::from_str(&s)?,