make secret-related config names consistent

README.md

@@ -29,7 +29,7 @@ Here's the complete table based on the provided Go code:
 | `-bsky-server-url`   | `BSKY_SERVER_URL`    | "https://bsky.network"                  | The Bluesky PDS server to send API requests to URL.                     |
 | `-watch-word`        | `WATCH_WORD`         | "tailscale"                             | The word to watch out for; may support multiple words in the future.    |
 | `-secrets-url`       | `SECRETS_URL`        | none                                    | The address of a [setec][setec] server to fetch secrets from (optional) |
-| `-secret-prefix`     | `SECRET_PREFIX`      | ""                                      | A prefix to prepend to secret names fetched from setec (optional)       |
+| `-secrets-prefix`    | `SECRETS_PREFIX`     | ""                                      | A prefix to prepend to secret names fetched from setec (optional)       |
 
 [jetstream]: https://github.com/bluesky-social/jetstream
 [setec]: https://github.com/tailscale/setec

cmd/bsky-webhook/main.go

@@ -43,7 +43,7 @@ var (
 
 	secretsURL = flag.String("secrets-url", envOr("SECRETS_URL", ""),
 		"the URL of a secrets server (if empty, no server is used)")
-	secretPrefix = flag.String("secrets-prefix", envOr("SECRET_PREFIX", ""),
+	secretPrefix = flag.String("secrets-prefix", envOr("SECRETS_PREFIX", ""),
 		"the prefix to prepend to secret names fetched from --secrets-url")
 )