feat: add Changelog.md and update scripts to reference it

- Created a new Changelog.md file to document version updates and changes.
- Updated the updatelog.mjs script to parse Changelog.md instead of UPDATELOG.md.
- Modified updater-fixed-webview2.mjs to use the new Changelog.md for update notes.

scripts/updatelog.mjs

@@ -2,9 +2,9 @@ import fs from "fs";
 import fsp from "fs/promises";
 import path from "path";
 
-const UPDATE_LOG = "UPDATELOG.md";
+const UPDATE_LOG = "Changelog.md";
 
-// parse the UPDATELOG.md
+// parse the Changelog.md
 export async function resolveUpdateLog(tag) {
   const cwd = process.cwd();
 
@@ -14,7 +14,7 @@ export async function resolveUpdateLog(tag) {
   const file = path.join(cwd, UPDATE_LOG);
 
   if (!fs.existsSync(file)) {
-    throw new Error("could not found UPDATELOG.md");
+    throw new Error("could not found Changelog.md");
   }
 
   const data = await fsp.readFile(file, "utf-8");
@@ -38,7 +38,7 @@ export async function resolveUpdateLog(tag) {
   });
 
   if (!map[tag]) {
-    throw new Error(`could not found "${tag}" in UPDATELOG.md`);
+    throw new Error(`could not found "${tag}" in Changelog.md`);
   }
 
   return map[tag].join("\n").trim();
@@ -49,7 +49,7 @@ export async function resolveUpdateLogDefault() {
   const file = path.join(cwd, UPDATE_LOG);
 
   if (!fs.existsSync(file)) {
-    throw new Error("could not found UPDATELOG.md");
+    throw new Error("could not found Changelog.md");
   }
 
   const data = await fsp.readFile(file, "utf-8");
@@ -77,7 +77,7 @@ export async function resolveUpdateLogDefault() {
   }
 
   if (!firstTag) {
-    throw new Error("could not found any version tag in UPDATELOG.md");
+    throw new Error("could not found any version tag in Changelog.md");
   }
 
   return content.join("\n").trim();