[SKIP CI][Tooling] Fix detection of existing translation changelog

CHANGELOG.md

@@ -128,7 +128,7 @@ Thank you for your contribution to the translation of the project.
 - French (by Graham Morin)
 - Indonesian (by Axel C)
 
-## Full changelog
+## Full Changelog
 - ([r1688](https://github.com/Suwayomi/Suwayomi-WebUI/commit/7d1f2dfe017dead41cc07772b0c11dfd034161fb)) [Codegen] Fix gql schema url (by @schroda)
 - ([r1687](https://github.com/Suwayomi/Suwayomi-WebUI/commit/a9fc2f13aaf45f3e7547b91d4ff2530300df05fd)) Translations update from Hosted Weblate ([#757](https://github.com/Suwayomi/Suwayomi-WebUI/pull/757) by @weblate, @leollo98, @kiritsumafuyu, @marimo-nekomimi, @tizio04, @aizhimoran)
 - ([r1686](https://github.com/Suwayomi/Suwayomi-WebUI/commit/36e943214c7861eadc4681ae72f908d4deb803c3)) Remove "default back to" functionality (by @schroda)

tools/scripts/createTranslationChangelog.ts

@@ -285,7 +285,7 @@ const getLanguageLinesFromChangelog = (): Promise<string[]> => {
     const fileReadPromise = new ControlledPromise<string[]>();
 
     const changelogFile = path.resolve(__dirname, '../../CHANGELOG.md');
-    const fileStream = fs.createReadStream(changelogFile); // Replace 'input.txt' with your file path
+    const fileStream = fs.createReadStream(changelogFile);
     const fileLineReader = readline.createInterface({
         input: fileStream,
         crlfDelay: Infinity, // Recognize all line breaks (CR LF) as a single line break
@@ -294,12 +294,12 @@ const getLanguageLinesFromChangelog = (): Promise<string[]> => {
     const translationRelevantLines: string[] = [];
     let isTranslationSection = false;
     fileLineReader.on('line', (line) => {
-        if (line === '## Translations') {
+        if (line.toLowerCase() === '## Translations'.toLowerCase()) {
             isTranslationSection = true;
             return;
         }
 
-        if (isTranslationSection && line === '## Full Changelog') {
+        if (isTranslationSection && line.toLowerCase() === '## Full Changelog'.toLowerCase()) {
             isTranslationSection = false;
             return;
         }