Update golang Docker tag to v1.22.6

Signed-off-by: red-hat-konflux <126015336+red-hat-konflux[bot]@users.noreply.github.com>

Dockerfile

@@ -13,7 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.21.8@sha256:c82d4ad02c062cf2b393bf0374df26638c6fed3dfe52cdbd3635d4a7befab86e AS builder
+FROM golang:1.22.6@sha256:305aae5c6d68e9c122246147f2fde17700d477c9062b6724c4d182abf6d3907e AS builder
 ENV APP_ROOT=/opt/app-root
 ENV GOPATH=$APP_ROOT
 
@@ -31,7 +31,7 @@ RUN CGO_ENABLED=0 go build -gcflags "all=-N -l" -ldflags "${SERVER_LDFLAGS}" -o
 RUN go test -c -ldflags "${SERVER_LDFLAGS}" -cover -covermode=count -coverpkg=./... -o rekor-server_test ./cmd/rekor-server
 
 # Multi-Stage production build
-FROM golang:1.21.8@sha256:c82d4ad02c062cf2b393bf0374df26638c6fed3dfe52cdbd3635d4a7befab86e as deploy
+FROM golang:1.22.6@sha256:305aae5c6d68e9c122246147f2fde17700d477c9062b6724c4d182abf6d3907e as deploy
 
 # Retrieve the binary from the previous stage
 COPY --from=builder /opt/app-root/src/rekor-server /usr/local/bin/rekor-server