Bump golang from 1.16.6 to 1.16.7 (sigstore#403)

Bumps golang from 1.16.6 to 1.16.7.

---
updated-dependencies:
- dependency-name: golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.16.6 AS builder
+FROM golang:1.16.7 AS builder
 ENV APP_ROOT=/opt/app-root
 ENV GOPATH=$APP_ROOT
 
@@ -30,7 +30,7 @@ RUN go build -ldflags "${SERVER_LDFLAGS}" ./cmd/rekor-server
 RUN CGO_ENABLED=0 go build -gcflags "all=-N -l" -ldflags "${SERVER_LDFLAGS}" -o rekor-server_debug ./cmd/rekor-server
 
 # Multi-Stage production build
-FROM golang:1.16.6 as deploy
+FROM golang:1.16.7 as deploy
 
 # Retrieve the binary from the previous stage
 COPY --from=builder /opt/app-root/src/rekor-server /usr/local/bin/rekor-server