Quick fix on SBOM page (#2939)

- [X] Check if this is a typo or other quick fix and ignore the rest :)

## Type of change
Quick clarification

### What should this PR do?
Specifies that CycloneDX SBOMs are available to customers

### Why are we making this change?
Make availability clearer

### What are the acceptance criteria? 
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### How should this PR be tested?
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Signed-off-by: s-stumbo <sally.stumbo@chainguard.dev>

Author: s-stumbo

content/chainguard/chainguard-images/how-to-use/retrieve-image-sboms/index.md

@@ -61,7 +61,7 @@ You can include the following flags when retrieving attestations:
         * https://slsa.dev/provenance/v1: Available on all images.
         * https://spdx.dev/Document: Available on all images.
         * https://chainguard.dev/end-of-life: Only available on EOL images in grace period.
-        * https://cyclonedx.org/bom: Only available on new builds or rebuilds after January 29, 2026.
+        * https://cyclonedx.org/bom: Only available to customers, on new builds or rebuilds after January 29, 2026.
         * https://chainguard.dev/helm-values/v1: Only images that are tested with Helm and have a corresponding upstream Helm chart have this attestation.
         * https://chainguard.dev/attestation/syft/v1: Not available on all images; this predicate is less common.
         * https://chainguard.dev/attestation/chart-lock/v1: Only present for images where Helm chart locking is relevant.