chore(ci): bump actions/checkout

[PierreZ]

Hopefully fixing the Coverall CI bug #77 (comment)

[coveralls]

Pull Request Test Coverage Report for Build 3669241489

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 41 unchanged lines in 5 files lost coverage.
• Overall coverage decreased (-0.5%) to 73.956%

---

Files with Coverage Reduction	New Missed Lines	%
foundationdb/src/directory/directory_subspace.rs	2	90.67%
target/x86_64-unknown-linux-gnu/debug/build/foundationdb-2c1356d722dd59e2/out/options.rs	4	30.4%
foundationdb/src/directory/directory_layer.rs	7	93.54%
foundationdb/src/database.rs	11	76.0%
foundationdb-bindingtester/src/main.rs	17	88.65%

Totals
Change from base Build 3600106319:	-0.5%
Covered Lines:	4285
Relevant Lines:	5794

---

💛 - Coveralls

[codecov-commenter]

Codecov Report

Base: 82.44% // Head: 81.99% // Decreases project coverage by -0.45% ⚠️

Coverage data is based on head (39ee37d) compared to base (a77116e).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #80      +/-   ##
==========================================
- Coverage   82.44%   81.99%   -0.46%     
==========================================
  Files          26       26              
  Lines        5042     5042              
==========================================
- Hits         4157     4134      -23     
- Misses        885      908      +23     

Impacted Files	Coverage Δ
foundationdb/src/database.rs	76.00% <0.00%> (-11.00%)	⬇️
foundationdb/src/directory/directory_subspace.rs	90.66% <0.00%> (-1.34%)	⬇️
foundationdb-bindingtester/src/main.rs	88.64% <0.00%> (-1.10%)	⬇️
foundationdb/src/directory/directory_layer.rs	93.53% <0.00%> (-0.81%)	⬇️
foundationdb/src/directory/mod.rs	94.11% <0.00%> (+0.73%)	⬆️
foundationdb/src/directory/directory_partition.rs	81.34% <0.00%> (+7.46%)	⬆️

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