Add obrufau to CSS Grid watchlist

Change-Id: Ieb86ea3598107a2417979773f1c90beca19042d4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1894004Reviewed-by: Manuel Rego <rego@igalia.com>
Commit-Queue: Oriol Brufau <obrufau@igalia.com>
Cr-Commit-Position: refs/heads/master@{#712069}

WATCHLISTS

@@ -2075,6 +2075,7 @@
     'blink_css_flexbox': ['cbiesinger@chromium.org'],
     'blink_css_fragmentation_tests': ['mstensho@chromium.org'],
     'blink_css_grid_layout': ['jfernandez@igalia.com',
+                              'obrufau@igalia.com',
                               'rego@igalia.com',
                               'svillar@igalia.com'],
     'blink_custom_elements': ['dominicc+watchlist@chromium.org'],