Add toolchain information back to tasks

Signed-off-by: trivernis <trivernis@protonmail.com>

.github/workflows/build-and-release.yml

@@ -14,6 +14,7 @@ jobs:
       - name: Set up toolchain
         uses: actions-rs/toolchain@v1
         with:
+          toolchain: nightly
           override: true
       - name: Cache cargo builds
         uses: actions/cache@v2

.github/workflows/build.yml

@@ -20,6 +20,7 @@ jobs:
       - name: Set up toolchain
         uses: actions-rs/toolchain@v1
         with:
+          toolchain: nightly
           override: true
       - name: Cache build data
         uses: actions/cache@v2