ci: cache vale binary

Author: naiyerasif

.github/workflows/regression.yml

@@ -14,11 +14,18 @@ jobs:
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
+      - name: Check cached Vale
+        id: cache-vale
+        uses: actions/cache@v4
+        with:
+          path: bin
+          key: vale-${{ VALE_VERSION }}
       - name: Install Vale
+        if: steps.cache-vale.outputs.cache-hit != 'true'
         run: |
           wget https://github.com/errata-ai/vale/releases/download/v${VALE_VERSION}/vale_${VALE_VERSION}_Linux_64-bit.tar.gz
-          mkdir vale && tar -xvzf vale_${VALE_VERSION}_Linux_64-bit.tar.gz -C vale
-          echo "$PWD/vale" >> $GITHUB_PATH
+          mkdir bin && tar -xvzf vale_${VALE_VERSION}_Linux_64-bit.tar.gz -C bin
+          echo "./bin" >> $GITHUB_PATH
           vale --version
       - name: Setup PNPM
         uses: pnpm/action-setup@v3