checkout v4

yegor256 · May 1, 2024 · 9d013a1 · 9d013a1
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diff --git a/.github/workflows/bibcop.yml b/.github/workflows/bibcop.yml
@@ -6,5 +6,5 @@ jobs:
   bibcop:
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v4
       - uses: yegor256/bibcop-action@master
diff --git a/main.bib b/main.bib
@@ -598,6 +598,7 @@ @book{martin2008clean
   publisher = {Pearson Education},
   title = {{Clean Code: A Handbook of Agile Software Craftsmanship}},
   year = {2008},
+  doi={10.5555/1388398}
 }
 
 @inproceedings{barnett2016relationship,