deps(go): bump module github.com/fluxcd/source-controller/api

clean: go mod tidy

ran shell command "go mod tidy"

deps(go): bump module github.com/fluxcd/source-controller/api to v1.9.4

go.mod updated Module path "github.com/fluxcd/source-controller/api" version from "v1.9.3" to "v1.9.4"

v1.9.4

## Changelog

[v1.9.4 changelog](https://github.com/fluxcd/source-controller/blob/v1.9.4/CHANGELOG.md)


## Container images

- `docker.io/fluxcd/source-controller:v1.9.4`
- `ghcr.io/fluxcd/source-controller:v1.9.4`

Supported architectures: `linux/amd64`, `linux/arm64` and `linux/arm/v7`.

The container images are built on GitHub hosted runners and are signed with cosign and GitHub OIDC.
To verify the images and their provenance (SLSA level 3), please see the [security documentation](https://fluxcd.io/flux/security/).

v1.9.3

## Changelog

[v1.9.3 changelog](https://github.com/fluxcd/source-controller/blob/v1.9.3/CHANGELOG.md)


## Container images

- `docker.io/fluxcd/source-controller:v1.9.3`
- `ghcr.io/fluxcd/source-controller:v1.9.3`

Supported architectures: `linux/amd64`, `linux/arm64` and `linux/arm/v7`.

The container images are built on GitHub hosted runners and are signed with cosign and GitHub OIDC.
To verify the images and their provenance (SLSA level 3), please see the [security documentation](https://fluxcd.io/flux/security/).

GitHub Action workflow link

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