[polly] polly: Fix typos discovered by codespell (PR #124545)

[Christian Clauss via llvm-commits]

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@@ -3,7 +3,7 @@
        {
          "name" : "MemRef_B",
          "sizes" : [ "*", "1024" ],
-	 "type" : "doble"
+	 "type" : "double"
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cclauss wrote:

Code change: Extra review, please.

https://github.com/llvm/llvm-project/pull/124545