ci: upgrade mozilla/sccache-action to v0.0.8 (#571)

Fixes #570.

Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>

Author: mukilan

.github/workflows/build.yml

@@ -37,7 +37,7 @@ jobs:
           brew list -1 | grep python | while read formula; do brew unlink $formula; brew link --overwrite $formula; done
           brew install llvm yasm
       - name: Run sccache-cache
-        uses: mozilla-actions/sccache-action@v0.0.4
+        uses: mozilla-actions/sccache-action@v0.0.8
       - name: Build
         run: |
           cargo build --verbose --features ${{ matrix.features }}
@@ -73,7 +73,7 @@ jobs:
         run: |
           sudo apt install llvm -y
       - name: Run sccache-cache
-        uses: mozilla-actions/sccache-action@v0.0.4
+        uses: mozilla-actions/sccache-action@v0.0.8
       - name: Build
         run: |
           cargo build --verbose --features ${{ matrix.features }}
@@ -122,7 +122,7 @@ jobs:
           curl -SL "https://github.com/servo/servo-build-deps/releases/download/msvc-deps/moztools-4.0.zip" --create-dirs -o target/dependencies/moztools.zip
           cd target/dependencies && unzip -qo moztools.zip -d .
       - name: Run sccache-cache
-        uses: mozilla-actions/sccache-action@v0.0.4
+        uses: mozilla-actions/sccache-action@v0.0.8
       - name: Build Windows
         shell: cmd
         run: |