fix: excluding current dir with max depth less than 2 (#1375)

Co-authored-by: tj-actions[bot] <109116665+tj-actions-bot@users.noreply.github.com>
Co-authored-by: GitHub Action <action@github.com>

src/changedFiles.ts

@@ -192,7 +192,7 @@ export const getChangeTypeFiles = async ({
 }): Promise<{paths: string; count: string}> => {
   const files = [
     ...new Set(getChangeTypeFilesGenerator({inputs, changedFiles, changeTypes}))
-  ]
+  ].filter(Boolean)
 
   if (inputs.json) {
     return {
@@ -236,7 +236,7 @@ export const getAllChangeTypeFiles = async ({
 }): Promise<{paths: string; count: string}> => {
   const files = [
     ...new Set(getAllChangeTypeFilesGenerator({inputs, changedFiles}))
-  ]
+  ].filter(Boolean)
 
   if (inputs.json) {
     return {