chainlist PR 8124: pin chains submodule after removing INSTALL_JAVA; document PR status

Made-with: Cursor

docs/00-meta/REPOSITORIES_AND_PRS_CHAIN138.md

@@ -1,6 +1,6 @@
 # Repositories and Pull Requests — Chain 138 (Forms Submitted, Awaiting Feedback)
 
-**Last Updated:** 2026-02-28  
+**Last Updated:** 2026-04-01  
 **Purpose:** Single reference for all repositories you can add, connect, or submit PRs to for Chain 138 support — including wallets, explorers, on-ramps/off-ramps. **Forms have been submitted where applicable; we are awaiting feedback.** Use this doc to open or connect PRs when partners respond or when you are ready to contribute.
 
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@@ -70,6 +70,8 @@ Chain 138 may already be listed (see chainlist.org/chain/138). If you need to ad
 
 **Local spec:** `pr-workspace/chains/_data/chains/eip155-138.json` in this repo (use as source for PR content).
 
+**Open PR (fork):** [ethereum-lists/chains#8124](https://github.com/ethereum-lists/chains/pull/8124) updates public RPCs and explorer for chain 138. Maintainer feedback (2026-03-24): do not include `INSTALL_JAVA.md` or helper scripts in the PR; those were removed from branch `update-chainid-138-rpc-endpoints` so the diff vs upstream is only `_data/chains/eip155-138.json`. Re-request review after CI is green.
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 ## 4. Consensys / MetaMask (outreach — no public “add chain” PR)