Merge bitcoin#21823: script: update REVIEWERS

48bd9eb script: update REVIEWERS (Adam Jonas)

Pull request description:

  Meta: `git show a06eb03` indicates the commit was first made one year ago and the PR was merged in September 2020.

  It might be time for an update, if automated review requests via DrahtBot are operational.

  "Regular contributors are free to add their names to specific directories or files provided that they are willing to provide a review."

  Perhaps we can compile and squash suggested updates here, per that guideline.

ACKs for top commit:
  practicalswift:
    ACK 48bd9eb: patch looks correct :)
  adamjonas:
    ACK 48bd9eb. I ran through the new files added with `*`s using `git ls-files`.
  hebasto:
    ACK 48bd9eb, I have reviewed the code and it looks OK, I agree it can be merged.

Tree-SHA512: 770fd60d78bd64100814c72211e4bd97718c87a55a4c91e136fababa0149d12cdc1b3e89462dee3a55e5f51d3263420cc6d856868469eb9a72ff8c930859c54f

REVIEWERS

@@ -19,6 +19,7 @@
 
 # Maintainers
 #   @fanquake
+#   @hebasto
 #   @jonasschnelli
 #   @laanwj
 #   @marcofalke
@@ -59,11 +60,16 @@
 /src/test/fuzz/                             @practicalswift
 /doc/fuzzing.md                             @practicalswift
 
-# Test framework
+# Tests
+/src/test/net_peer_eviction_tests.cpp       @jonatack
 /test/functional/mempool_updatefromblock.py @hebasto
 /test/functional/feature_asmap.py           @jonatack
 /test/functional/interface_bitcoin_cli.py   @jonatack
-/test/functional/tool_wallet.py             @jonatack
+
+# Backwards compatibility tests
+*_compatibility.py                          @sjors
+/test/functional/wallet_upgradewallet.py    @sjors @achow101
+/test/get_previous_releases.py              @sjors
 
 # Translations
 /src/util/translation.h                     @hebasto
@@ -98,15 +104,19 @@
 # Descriptors
 *descriptor*                                @achow101 @sipa
 
+# External signer
+*external_signer*                           @sjors
+/doc/external-signer.md                     @sjors
+*signer.py                                  @sjors
+
 # Interfaces
 /src/interfaces/                            @ryanofsky
 
 # DB
 /src/txdb.*                                 @jamesob
 /src/dbwrapper.*                            @jamesob
 
-# Scripts/Linter
-*.sh                                        @practicalswift
+# Linter
 /test/lint/                                 @practicalswift
 /test/lint/lint-shell.sh                    @hebasto