[ProfileData] Use static_assert instead of assert (NFC)

Identified with misc-static-assert.

Author: kazutakahirata

llvm/lib/ProfileData/InstrProfWriter.cpp

@@ -657,8 +657,8 @@ Error InstrProfWriter::writeImpl(ProfOStream &OS) {
                        : IndexedInstrProf::ProfVersion::CurrentVersion;
   // The WritePrevVersion handling will either need to be removed or updated
   // if the version is advanced beyond 12.
-  assert(IndexedInstrProf::ProfVersion::CurrentVersion ==
-         IndexedInstrProf::ProfVersion::Version12);
+  static_assert(IndexedInstrProf::ProfVersion::CurrentVersion ==
+                IndexedInstrProf::ProfVersion::Version12);
   if (static_cast<bool>(ProfileKind & InstrProfKind::IRInstrumentation))
     Header.Version |= VARIANT_MASK_IR_PROF;
   if (static_cast<bool>(ProfileKind & InstrProfKind::ContextSensitive))