Move win-celab-rel to internal.chrome.fyi master.

Following up on change https://crrev.com/i/2022512.

Change-Id: I5cdb19e71d9999aa7a4bc90d866f06668ed53648
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1876788Reviewed-by: Ben Pastene <bpastene@chromium.org>
Commit-Queue: Mathieu Binette <mbinette@google.com>
Cr-Commit-Position: refs/heads/master@{#708805}

tools/mb/mb_config.pyl

@@ -22,10 +22,13 @@
       'linux-chromeos-google-rel': 'official_goma_chromeos_minimal_symbols',
       'linux-google-rel': 'official_goma',
       'mac-google-rel': 'official_goma',
-      'win-celab-rel': 'official_celab_release_bot',
       'win-google-rel': 'official_goma_x86',
     },
 
+    'internal.chrome.fyi': {
+      'win-celab-rel': 'official_celab_release_bot',
+    },
+
     'chromeos.chrome': {
       'chrome-tot-chromeos-amd64-generic': 'cros_chrome_sdk',
       'Chrome4CROS Packages': 'chromeos_with_codecs_release_bot',