chore: add 9f9a11 to git blame ignore (#11667)

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## **Description**

This PR adds commit
[9f9a11](9f9a112)
from #1379 to
`.git-blame-ignore-revs`

## **Related issues**

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## **Manual testing steps**

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.git-blame-ignore-revs

@@ -2,3 +2,5 @@
 57afe4ca921d85a51a923470239ca977fccbd1ae
 # Standardize prettier configuration https://github.com/MetaMask/metamask-mobile/pull/4182
 bdb7f37c90e4fc923881a07fca38d4e77c73a579
+# Fix mixed tabs and spaces https://github.com/MetaMask/metamask-mobile/pull/1379
+9f9a1121c6899e06d4aeef29017bb479df142adb