[ci] Update 'Tarpaulin to codecov.io' job to use nightly-2021-03-23

diff --git a/.github/workflows/code_coverage.yml b/.github/workflows/code_coverage.yml
index d61ab757870deb7c28b037355320fc514612489e..ce84c4ffad679aab0db389c42df2893d8f6a5b8a 100644 (file)
--- a/.github/workflows/code_coverage.yml
+++ b/.github/workflows/code_coverage.yml
@@ -11,7 +11,7 @@ jobs:
         uses: actions/checkout@v2
 
       - name: Set default toolchain
-        run: rustup default nightly
+        run: rustup default nightly-2021-03-23
       - name: Set profile
         run: rustup set profile minimal