fix: remove PR/commit-specific keys from docs-build cache (#26379)

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

.github/workflows/docs-build.yml

@@ -20,16 +20,10 @@ jobs:
           cache-name: docs-build
           key-1: ${{ hashFiles('yarn.lock') }}
           key-2: ${{ hashFiles('docs/**.*', '!**/node_modules') }}
-          key-3: ${{ github.event.pull_request.number || github.ref }}
-          key-4: ${{ github.sha }}
         with:
           path: |
             **/docs/**
-          key: ${{ runner.os }}-${{ env.cache-name }}-${{ env.key-1 }}-${{ env.key-2 }}-${{ env.key-3 }}-${{ env.key-4 }}
-            # Log cache hit
-      - name: Log Cache Hit
-        if: steps.cache-docs-build.outputs.cache-hit == 'true'
-        run: echo "Cache hit for Docs build. Skipping build."
+          key: ${{ env.cache-name }}-${{ env.key-1 }}-${{ env.key-2 }}
       - name: Run build
         if: steps.cache-docs-build.outputs.cache-hit != 'true'
         working-directory: docs