add some path normalization, why not

src/compiler/docs/readme/output-docs.ts

@@ -1,4 +1,4 @@
-import { join, relative } from '@utils';
+import { join, normalizePath, relative } from '@utils';
 
 import type * as d from '../../../declarations';
 import { AUTO_GENERATE_COMMENT } from '../constants';
@@ -47,7 +47,7 @@ export const generateReadme = async (
         const readmeOutputPath = join(readmeOutput.dir, relativeReadmePath);
 
         const currentReadmeContent =
-          readmeOutput.dir !== config.srcDir
+          normalizePath(readmeOutput.dir) !== normalizePath(config.srcDir)
             ? // The user set a custom `.dir` property, which is where we're going
               // to write the updated README. We need to read the non-automatically
               // generated content from that file and preserve that.