Release preparation for version 2.16.2

cpp/ql/src/change-notes/released/0.9.4.md

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+## 0.9.4
+
+### Minor Analysis Improvements
+
+* Corrected 2 false positive with `cpp/incorrect-string-type-conversion`: conversion of byte arrays to wchar and new array allocations converted to wchar.
+* The "Incorrect return-value check for a 'scanf'-like function" query (`cpp/incorrectly-checked-scanf`) no longer reports an alert when an explicit check for EOF is added.
+* The "Incorrect return-value check for a 'scanf'-like function" query (`cpp/incorrectly-checked-scanf`) now recognizes more EOF checks.
+* The "Potentially uninitialized local variable" query (`cpp/uninitialized-local`) no longer reports an alert when the local variable is used as a qualifier to a static member function call.
+* ```
+* The diagnostic query `cpp/diagnostics/successfully-extracted-files` now considers any C/C++ file seen during extraction, even one with some errors, to be extracted / scanned. This affects the Code Scanning UI measure of scanned C/C++ files.