build(deps): bump dotnet/runtime-deps (#589)

Bumps dotnet/runtime-deps from 6.0.8-bullseye-slim-amd64 to 7.0.20-bullseye-slim-amd64.

---
updated-dependencies:
- dependency-name: dotnet/runtime-deps
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

Dockerfile

@@ -4,7 +4,7 @@ WORKDIR /app/src/Microsoft.Sbom.Tool
 ARG RUNTIME=linux-x64
 RUN dotnet publish -f net8.0 -r $RUNTIME --self-contained true -p:DebugType=None -p:DebugSymbols=false -p:PublishSingleFile=true -p:IncludeAllContentForSelfExtract=true -o output
 
-FROM mcr.microsoft.com/dotnet/runtime-deps:6.0.8-bullseye-slim-amd64
+FROM mcr.microsoft.com/dotnet/runtime-deps:7.0.20-bullseye-slim-amd64
 WORKDIR /app/src/Microsoft.Sbom.Tool
 COPY --from=build-env /app/src/Microsoft.Sbom.Tool/output .