chore(deps): update continuumio/miniconda3 docker tag to v26

[anaconda-renovate]

This PR contains the following updates:

Package	Type	Update	Change
continuumio/miniconda3	final	major	v25.11.1-1 → 26.1.1-1
continuumio/miniconda3	stage	major	v25.11.1-1 → 26.1.1-1

renovate update details

Field	Value
manager	dockerfile
categories	docker
datasource	docker
depName	continuumio/miniconda3
depType¹	final
packageName	continuumio/miniconda3
sourceUrl	https://github.com/anaconda/docker-images
updateType	major
versioning	docker

¹ only available for some managers

renovate update details

Field	Value
manager	dockerfile
categories	docker
datasource	docker
depName	continuumio/miniconda3
depType¹	stage
packageName	continuumio/miniconda3
sourceUrl	https://github.com/anaconda/docker-images
updateType	major
versioning	docker

¹ only available for some managers

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