Update caniuse help message and stats strategy

extension/command/help.js

@@ -13,7 +13,7 @@ class HelpCommand extends Command {
             "#": `Prefix ${c.match("#")} to search builtin attributes`,
             "%": `Prefix ${c.match("%")} to search Rust official book chapters`,
             ">": `Prefix ${c.match(">")} to search Rust clippy lints`,
-            "?": `[WIP] Prefix ${c.match("?")} to search Rust tracking issues`,
+            "?": `Prefix ${c.match("?")} to search caniuse.rs, prefix ${c.match("??")} can redirect to the RFC page`,
         };
         return Object.entries(value).map(([key, description], index) => {
             return {content: key, description};

extension/stats/index.js

@@ -49,10 +49,10 @@ let stats = [
     },
     {
         name: "Others",
-        pattern: /^[>%].*/i,
+        pattern: /^[>%?].*/i,
         value: 0,
         color: "#ededed",
-        description: "Others count any Clippy lint (>) or book (%) prefix searches."
+        description: "Others count any Clippy lint (>), book (%), and caniuse/rfc (?) prefix searches."
     },
 ];
 let calendarData = [];