chore(deps): update golang:1.21 docker digest to f2eb989 (slsa-framew…

…ork#796)

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This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| golang | stage | digest | `b405b62` -> `f2eb989` |

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cli/experimental/service/Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.21@sha256:b405b620c7b53ef64695c7da7c8396f411f381c1eb7da6713c585dd7eca1559b AS base
+FROM golang:1.21@sha256:f2eb989b0b5579b75652b72ee7b3b04cb1736fc254d7efbf3e492d4c9ea7235a AS base
 WORKDIR /src
 ENV CGO_ENABLED=0
 COPY . ./