Fix CVE-2025-69262: Upgrade transitive dependency @pnpm/npm-conf from 2.3.1 to 3.0.2

Summary:
Fix CVE-2025-69262: Upgrade transitive dependency pnpm/npm-conf from 2.3.1 to 3.0.2

## Summary
Upgrading the transitive dependency `pnpm/npm-conf` from 2.3.1 to 3.0.2 to fix CVE-2025-69262.

### Approach
Rather than forcing `pnpm/npm-conf` to 3.0.2 via a permanent resolution (which would cross a major version boundary for its consumer `registry-auth-token@5.1.0` that expects `^2.1.0`), we nudged `registry-auth-token` from 5.1.0 → 5.1.1. Version 5.1.1 natively depends on `pnpm/npm-conf@^3.0.2`, and is within the existing `^5.0.1` semver range from `package-json@8.1.1`.

### Dependency chain
```
docusaurus/core (direct)
  → update-notifier@6.0.2
    → latest-version@7.0.0
      → package-json@8.1.1 (requires registry-auth-token@^5.0.1)
        → registry-auth-token@5.1.1 (requires pnpm/npm-conf@^3.0.2)
          → pnpm/npm-conf@3.0.2
```

No permanent resolution was needed — the version sticks after removing the temporary resolution.

### yarn why output
```
pnpm/npm-conf@3.0.2
  docusaurus/core > update-notifier > latest-version > package-json > registry-auth-token depends on it

registry-auth-token@5.1.1
  docusaurus/core > update-notifier > latest-version > package-json depends on it
```

Reviewed By: huntie

Differential Revision: D96355741

fbshipit-source-id: 0b8873b01f472154f8d7240540f51ee3d758f7b4

Author: balajacatherin

website/yarn.lock

@@ -2146,10 +2146,10 @@
   dependencies:
     graceful-fs "4.2.10"
 
-"@pnpm/npm-conf@^2.1.0":
-  version "2.3.1"
-  resolved "https://registry.yarnpkg.com/@pnpm/npm-conf/-/npm-conf-2.3.1.tgz#bb375a571a0bd63ab0a23bece33033c683e9b6b0"
-  integrity sha512-c83qWb22rNRuB0UaVCI0uRPNRr8Z0FWnEIvT47jiHAmOIUHbBOg5XvV7pM5x+rKn9HRpjxquDbXYSXr3fAKFcw==
+"@pnpm/npm-conf@^3.0.2":
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/@pnpm/npm-conf/-/npm-conf-3.0.2.tgz#857622421aa9bbf254e557b8a022c216a7928f47"
+  integrity sha512-h104Kh26rR8tm+a3Qkc5S4VLYint3FE48as7+/5oCEcKR2idC/pF1G6AhIXKI+eHPJa/3J9i5z0Al47IeGHPkA==
   dependencies:
     "@pnpm/config.env-replace" "^1.1.0"
     "@pnpm/network.ca-file" "^1.0.1"
@@ -9511,11 +9511,11 @@ regexpu-core@^6.2.0:
     unicode-match-property-value-ecmascript "^2.1.0"
 
 registry-auth-token@^5.0.1:
-  version "5.1.0"
-  resolved "https://registry.yarnpkg.com/registry-auth-token/-/registry-auth-token-5.1.0.tgz#3c659047ecd4caebd25bc1570a3aa979ae490eca"
-  integrity sha512-GdekYuwLXLxMuFTwAPg5UKGLW/UXzQrZvH/Zj791BQif5T05T0RsaLfHc9q3ZOKi7n+BoprPD9mJ0O0k4xzUlw==
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/registry-auth-token/-/registry-auth-token-5.1.1.tgz#f1ff69c8e492e7edee07110b4752dd0a8aa82853"
+  integrity sha512-P7B4+jq8DeD2nMsAcdfaqHbssgHtZ7Z5+++a5ask90fvmJ8p5je4mOa+wzu+DB4vQ5tdJV/xywY+UnVFeQLV5Q==
   dependencies:
-    "@pnpm/npm-conf" "^2.1.0"
+    "@pnpm/npm-conf" "^3.0.2"
 
 registry-url@^6.0.0:
   version "6.0.1"