gnu: guix-build-coordinator: Update to 0-40.226ec0f.

* gnu/packages/package-management.scm (guix-build-coordinator): Update to
0-40.226ec0f.
* doc/guix.texi (Guix Build Coordinator): Remove note about the service being
considered experimental, it's been stable for a while now.

doc/guix.texi

@@ -32456,12 +32456,6 @@ running an @dfn{agent}.  The build daemon is still used to build the
 derivations, but the Guix Build Coordinator manages allocating builds
 and working with the results.
 
-@quotation Note
-This service is considered experimental.  Configuration options may be
-changed in a backwards-incompatible manner, and not all features have
-been thorougly tested.
-@end quotation
-
 The Guix Build Coordinator consists of one @dfn{coordinator}, and one or
 more connected @dfn{agent} processes.  The coordinator process handles
 clients submitting builds, and allocating builds to agents.  The agent

gnu/packages/package-management.scm

@@ -1181,8 +1181,8 @@ environments.")
     (license (list license:gpl3+ license:agpl3+ license:silofl1.1))))
 
 (define-public guix-build-coordinator
-  (let ((commit "c9c55c0a16c0d72ad11389baf722ce90644c45d7")
-        (revision "39"))
+  (let ((commit "226ec0f0f8a10842ffdd50dd464be33b2db45563")
+        (revision "40"))
     (package
       (name "guix-build-coordinator")
       (version (git-version "0" revision commit))
@@ -1193,7 +1193,7 @@ environments.")
                       (commit commit)))
                 (sha256
                  (base32
-                  "1sxbfc3fy9x8vvhkpj68m5gz0rj6h66w8xcsqi26zx85d7jcs3h3"))
+                  "1sxvp7j5xypk6zlrs5y21lwx12h5r0c35ia9wqf0cyq8wjjaagh8"))
                 (file-name (string-append name "-" version "-checkout"))))
       (build-system gnu-build-system)
       (arguments