[clang-tools-extra] [mlir] [NFC][MLIR] Fix some typos (PR #108355)

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@@ -121,7 +121,7 @@ struct EmulateWideIntPass final
         [&typeConverter](Operation *op) { return typeConverter.isLegal(op); });
 
     RewritePatternSet patterns(ctx);
-    // Add common pattenrs to support contants, functions, etc.
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VitalyAnkh wrote:

You are so quick! I'm still undoing some false positives introduced by my grammar tools. Mark this as a draft before this is ready

https://github.com/llvm/llvm-project/pull/108355