[api] Advance deprecation for Value::BooleanValue

Mark Context version of BooleanValue as V8_DEPRECATED.

Bug: v8:7279, v8:8562
Change-Id: I152f5080d92a940dadea9e8f2ed3f25338e6f099
Reviewed-on: https://chromium-review.googlesource.com/c/1458245Reviewed-by: Yang Guo <yangguo@chromium.org>
Commit-Queue: Dan Elphick <delphick@chromium.org>
Cr-Commit-Position: refs/heads/master@{#59452}

include/v8.h

@@ -2562,9 +2562,9 @@ class V8_EXPORT Value : public Data {
 
   bool BooleanValue(Isolate* isolate) const;
 
-  V8_DEPRECATE_SOON("BooleanValue can never throw. Use Isolate version.",
-                    V8_WARN_UNUSED_RESULT Maybe<bool> BooleanValue(
-                        Local<Context> context) const);
+  V8_DEPRECATED("BooleanValue can never throw. Use Isolate version.",
+                V8_WARN_UNUSED_RESULT Maybe<bool> BooleanValue(
+                    Local<Context> context) const);
   V8_WARN_UNUSED_RESULT Maybe<double> NumberValue(Local<Context> context) const;
   V8_WARN_UNUSED_RESULT Maybe<int64_t> IntegerValue(
       Local<Context> context) const;