Fix: awk script did not check each line of input

Author: spnda

.github/workflows/docs-checker.yml

@@ -21,4 +21,4 @@ jobs:
       - name: Get changed file names of files changed in PR
         run: git diff -U0 ${{ github.event.pull_request.base.sha }} ${{ github.sha }} | grep -P "^(?!.*(http|ftp|https):\/\/([\w_-]+(?:(?:\.[\w_-]+)+))([\w.,@?^=%&:\/~+#-]*[\w@?^=%&\/~+#-])).*" | grep -P "^\+{1}(?!\+)" > diff_files.txt
       - name: Count line lengths in diff_files.txt
-        run: "awk -F: 'BEGIN { if(length>100) { err = 1; exit; } } END {exit err}' diff_files.txt"
+        run: "awk -F: '{ if(length>100) { err = 1; exit err; } }' diff_files.txt"