Fix container SVG undefined

[DanWebb]

Although reduced, we're still getting the "Unknown variable dynamic import: ./svg/undefined.svg" errors

Based on the tag, they all seem to be from the container SVG now, so I've applied the same fix to this component as was given to the icon component.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[github-actions]

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ EDITORCONFIG	editorconfig-checker	1		0	0.01s
✅ REPOSITORY	checkov	yes		no	19.64s
⚠️ REPOSITORY	gitleaks	yes		6	2.9s
✅ REPOSITORY	git_diff	yes		no	0.02s
✅ REPOSITORY	secretlint	yes		no	1.86s
✅ REPOSITORY	trivy-sbom	yes		no	1.84s
✅ REPOSITORY	trufflehog	yes		no	31.78s
✅ TSX	eslint	1		0	6.16s

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[DanWebb]

🎉 This PR is included in version 1.50.2 🎉

The release is available on:

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