Update diff reasons for tests

Signed-off-by: Hana Joo <hanajoo@google.com>

Author: h-joo

tests/baselines/reference/isolated-declarations/auto-fixed/diff/declarationEmitExpandoPropertyPrivateName.d.ts.diff

@@ -1,4 +1,4 @@
-// [[Reason: Function declarations are not fixed]] ////
+// [[Reason: Cannot name internal type]] ////
 
 //// [tests/cases/compiler/declarationEmitExpandoPropertyPrivateName.ts] ////
 

tests/baselines/reference/isolated-declarations/auto-fixed/diff/declarationEmitFunctionKeywordProp.d.ts.diff

@@ -1,4 +1,4 @@
-// [[Reason: Function declarations are not fixed]] ////
+// [[Reason: Cannot resolve non-static property names]] ////
 
 //// [tests/cases/compiler/declarationEmitLateBoundAssignments2.ts] ////
 

tests/baselines/reference/isolated-declarations/auto-fixed/diff/declarationEmitLateBoundAssignments.d.ts.diff

@@ -1,4 +1,4 @@
-// [[Reason: Function declarations are not fixed]] ////
+// [[Reason: Cannot resolve non-static property names]] ////
 
 //// [tests/cases/compiler/isolatedDeclarationLazySymbols.ts] ////