Add PR number to git-blame-ignore-revs comment for ruff formatting

.git-blame-ignore-revs

@@ -10,5 +10,5 @@ af942a27e41b47e257b6cd46c01a13cd381fed04
 01986cfa1702929352ac8b6d58ada6070da2c700
 # Initial black reformatting (#7967)
 d10f15e55806c6944827d801cd9c2d53f5da4186
-# Initial ruff reformatting
+# Initial ruff reformatting (#11220)
 f8fc2c3a2052988f7b458e26f621e058d67a76c9