[clang-tools-extra] [clang-tidy][docs] Update CERT links to current SEI URLs. NFC. (PR #207893)

[Zeyi Xu via cfe-commits]

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@@ -85,9 +85,7 @@ void ThrowByValueCatchByReferenceCheck::diagnoseThrowLocations(
   // If the throw statement does not throw by pointer then it throws by value
   // which is ok.
   // There are addition checks that emit diagnosis messages if the thrown value
-  // is not an RValue. See:
-  // https://www.securecoding.cert.org/confluence/display/cplusplus/ERR09-CPP.+Throw+anonymous+temporaries
-  // This behavior can be influenced by an option.
+  // is not an RValue. This behavior can be influenced by an option.
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zeyi2 wrote:

ERR09-CPP is a CERT C++ Coding Standard recommendation, whose documentation is no longer public now on https://cmu-sei.github.io/secure-coding-standards/sei-cert-cpp-coding-standard

https://github.com/llvm/llvm-project/pull/207893