Update README.md

Fix typo

Author: ShukantPal

packages/webdoc-cli/README.md

@@ -42,4 +42,4 @@ webdoc determines the list of source files as follows:
 1. All paths in `source.include` and their subdirectories are added.
 2. Paths matching atleast one `source.includePattern` are kept (skipped if no include pattern is provided).
 3. Paths matching atleast one `source.excludePattern` are filtered out.
-4. Alls path that equal or are inside a path in `source.exclude` are filtered out.
+4. All paths that equal or are inside a path in `source.exclude` are filtered out.