build(deps): bump golang from e68f6a0 to 6981837 (#2222)

Bumps golang from `e68f6a0` to `6981837`.

---
updated-dependencies:
- dependency-name: golang
  dependency-version: 1.25.4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>
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:1.25.4@sha256:e68f6a00e88586577fafa4d9cefad1349c2be70d21244321321c407474ff9bf2 AS builder
+FROM golang:1.25.4@sha256:698183780de28062f4ef46f82a79ec0ae69d2d22f7b160cf69f71ea8d98bf25d AS builder
 ENV APP_ROOT=/opt/app-root
 ENV GOPATH=$APP_ROOT
 
@@ -28,7 +28,7 @@ RUN go build -o server main.go
 RUN CGO_ENABLED=1 go build -gcflags "all=-N -l" -o server_debug main.go
 
 # Multi-Stage production build
-FROM golang:1.25.4@sha256:e68f6a00e88586577fafa4d9cefad1349c2be70d21244321321c407474ff9bf2 AS deploy
+FROM golang:1.25.4@sha256:698183780de28062f4ef46f82a79ec0ae69d2d22f7b160cf69f71ea8d98bf25d AS deploy
 
 # Retrieve the binary from the previous stage
 COPY --from=builder /opt/app-root/src/server /usr/local/bin/fulcio-server

Dockerfile.tesseract

@@ -16,7 +16,7 @@
 
 FROM ghcr.io/sigstore/scaffolding/tesseract/posix:v0.1.1-0.20251112113307-52b154e44576 AS server
 
-FROM golang:1.25.4@sha256:e68f6a00e88586577fafa4d9cefad1349c2be70d21244321321c407474ff9bf2 AS deploy
+FROM golang:1.25.4@sha256:698183780de28062f4ef46f82a79ec0ae69d2d22f7b160cf69f71ea8d98bf25d AS deploy
 
 COPY --from=server /ko-app/posix /usr/local/bin/tesseract