add codespell action (#18818)

Original work here, #18474,  refixed and updated.

cmd/postpolicyform.go

@@ -260,7 +260,7 @@ func parsePostPolicyForm(r io.Reader) (PostPolicyForm, error) {
 	return parsedPolicy, nil
 }
 
-// checkPolicyCond returns a boolean to indicate if a condition is satisified according
+// checkPolicyCond returns a boolean to indicate if a condition is satisfied according
 // to the passed operator
 func checkPolicyCond(op string, input1, input2 string) bool {
 	switch op {