chore(ci): update tarpaulin action to v0.1

Author: S-Coyle

.github/workflows/pr.yml

@@ -112,7 +112,7 @@ jobs:
 
       # Run cargo tarpaulin & push result to coveralls.io
       - name: rust-tarpaulin code coverage check
-        uses: actions-rs/tarpaulin@master
+        uses: actions-rs/tarpaulin@v0.1
         with:
           args: '-v --release --out Lcov'
       - name: Push code coverage results to coveralls.io