chore: upgrade probe-assets to latest version (#1683)

## Checklist

- [x] I have read the [contribution
guidelines](https://github.com/ooni/probe-cli/blob/master/CONTRIBUTING.md)
- [x] reference issue for this pull request:
ooni/probe#2841
- [ ] if you changed anything related to how experiments work and you
need to reflect these changes in the ooni/spec repository, please link
to the related ooni/spec pull request: <!-- add URL here -->
- [ ] if you changed code inside an experiment, make sure you bump its
version number

<!-- Reminder: Location of the issue tracker:
https://github.com/ooni/probe -->

## Description

This diff updates the probe-assets dependency to the latest version.

go.mod

@@ -31,7 +31,7 @@ require (
 	github.com/ooni/netem v0.0.0-20240208095707-608dcbcd82b8
 	github.com/ooni/oocrypto v0.7.1
 	github.com/ooni/oohttp v0.8.1
-	github.com/ooni/probe-assets v0.25.0
+	github.com/ooni/probe-assets v0.26.0
 	github.com/oschwald/maxminddb-golang v1.13.1
 	github.com/pborman/getopt/v2 v2.1.0
 	github.com/pion/stun v0.6.1

go.sum

@@ -409,8 +409,8 @@ github.com/ooni/oocrypto v0.7.1 h1:khxylCY8G9Cx26DNfX1uFpXKu1Qhoy3p/SfRyhBeyAQ=
 github.com/ooni/oocrypto v0.7.1/go.mod h1:kzRkZ1AGWFWLJW+ncw94c9ulpEI0oyDGDj59tGKpFuc=
 github.com/ooni/oohttp v0.8.1 h1:WVTgmweiR9398vZcRchwnQqqPo//1pIl2xnlvdvPV9w=
 github.com/ooni/oohttp v0.8.1/go.mod h1:6KnSv/hwqZFegFugPEHUGFghmby/9LavhA3BtCE+RQ4=
-github.com/ooni/probe-assets v0.25.0 h1:W/zqKRjkRkTYKHURhiFIuflh+Trm1WaPUWSfVU/y2VA=
-github.com/ooni/probe-assets v0.25.0/go.mod h1:m0k2FFzcLfFm7dhgyYkLCUR3R0CoRPr0jcjctDS2+gU=
+github.com/ooni/probe-assets v0.26.0 h1:pzhUcKOK7S0VNEeSeK2H6o5+KhuihNTQRtfXC7R7Spk=
+github.com/ooni/probe-assets v0.26.0/go.mod h1:m0k2FFzcLfFm7dhgyYkLCUR3R0CoRPr0jcjctDS2+gU=
 github.com/oschwald/geoip2-golang v1.9.0 h1:uvD3O6fXAXs+usU+UGExshpdP13GAqp4GBrzN7IgKZc=
 github.com/oschwald/geoip2-golang v1.9.0/go.mod h1:BHK6TvDyATVQhKNbQBdrj9eAvuwOMi2zSFXizL3K81Y=
 github.com/oschwald/maxminddb-golang v1.13.1 h1:G3wwjdN9JmIK2o/ermkHM+98oX5fS+k5MbwsmL4MRQE=