Cache rq binary

Signed-off-by: Charlie Egan <charlie@styra.com>

.github/workflows/build.yaml

@@ -37,7 +37,20 @@ jobs:
           version: edge
           static: ${{ matrix.os.static }}
       - run: npm install -g markdownlint-cli
+      - name: Restore rq cache
+        id: cache-rq
+        uses: actions/cache@v3
+        with:
+          path: ~/go/bin/rq
+          key: ${{ runner.os }}-rq
       - run: go install git.sr.ht/~charles/rq/cmd/rq@latest
+      - run: which rq
+      - name: Cache rq binary
+        if: steps.cache-binary.outputs.cache-hit != 'true'
+        uses: actions/cache@v3
+        with:
+          path: ~/go/bin/rq
+          key: ${{ runner.os }}-go-rq
       - run: build/do.rq pull_request
       - uses: golangci/golangci-lint-action@v6.0.1
         if: matrix.os.name == 'linux'