Update O= labels of Staging roots (#2081)

Fix a copy/paste error from the previous generation of staging roots.

Author: aarongable

content/en/docs/staging-environment.md

@@ -1,7 +1,7 @@
 ---
 title: Staging Environment
 slug: staging-environment
-lastmod: 2025-11-24
+lastmod: 2025-11-25
 show_lastmod: 1
 ---
 
@@ -60,12 +60,12 @@ If you wish to modify a test-only client to trust the staging environment for te
   * Certificate details (self-signed): [der](/certs/staging/letsencrypt-stg-root-x2.der), [pem](/certs/staging/letsencrypt-stg-root-x2.pem), [txt](/certs/staging/letsencrypt-stg-root-x2.txt)
   * Certificate details (cross-signed by Pretend Pear X1): [der](/certs/staging/letsencrypt-stg-root-x2-signed-by-x1.der), [pem](/certs/staging/letsencrypt-stg-root-x2-signed-by-x1.pem), [txt](/certs/staging/letsencrypt-stg-root-x2-signed-by-x1.txt)
 * **Yearning Yucca Root YE**
-  * Subject: `O = (STAGING) ISRG, CN = (STAGING) Yearning Yucca Root YE`
+  * Subject: `O = ISRG, CN = (STAGING) Yearning Yucca Root YE`
   * Key type: `ECDSA P-384`
   * Certificate details (self-signed): [der](/certs/staging/gen-y/root-ye.der), [pem](/certs/staging/gen-y/root-ye.pem), [txt](/certs/staging/gen-y/root-ye.txt)
   * Certificate details (cross-signed by Bogus Broccoli X2): [der](/certs/staging/gen-y/root-ye-by-x2.der), [pem](/certs/staging/gen-y/root-ye-by-x2.pem), [txt](/certs/staging/gen-y/root-ye-by-x2.txt)
 * **Yearning Yonder Yam Root YR**
-  * Subject: `O = (STAGING) ISRG, CN = (STAGING) Yonder Yam Root YR`
+  * Subject: `O = ISRG, CN = (STAGING) Yonder Yam Root YR`
   * Key type: `RSA 4096`
   * Certificate details (self-signed): [der](/certs/staging/gen-y/root-yr.der), [pem](/certs/staging/gen-y/root-yr.pem), [txt](/certs/staging/gen-y/root-yr.txt)
   * Certificate details (cross-signed by Pretend Pear X1): [der](/certs/staging/gen-y/root-yr-by-x1.der), [pem](/certs/staging/gen-y/root-yr-by-x1.pem), [txt](/certs/staging/gen-y/root-yr-by-x1.txt)