CLDR-19053 Update release tags to beta3 and known issues (#5130)

Author: AEApple

docs/site/downloads/cldr-48.md

@@ -6,7 +6,7 @@ title: CLDR 48 Release Note
 
 | No. |    Date    | Rel. Note |  Data  |  Charts  | Spec |   Delta  | GitHub Tag | Delta DTD | CLDR JSON |
 |:---:|:----------:|:---------:|:------:|:--------:|:------------:|:---:|:----------:|:---------:|:---------:|
-|  48 | 2025-10-~~XX~~ | [v48](/index/downloads/cldr-48) | ~~[CLDR48](https://unicode.org/Public/cldr/48/)~~ | [Charts48](https://unicode.org/cldr/charts/dev) | [LDML48](https://www.unicode.org/reports/tr35/proposed.html) | [Δ48](https://unicode-org.atlassian.net/issues/?jql=project%20%3D%20CLDR%20AND%20status%20%3D%20Done%20AND%20resolution%20%3D%20Fixed%20AND%20fixversion%20%3D%2048%20ORDER%20BY%20priority%20DESC) | [release-48-beta2](https://github.com/unicode-org/cldr/releases/tag/release-48-beta2) | [ΔDtd48](https://www.unicode.org/cldr/charts/dev/supplemental/dtd_deltas.html) | [48.0.0-BETA2](https://github.com/unicode-org/cldr-json/releases/tag/48.0.0-BETA2)) |
+|  48 | 2025-10-~~XX~~ | [v48](/index/downloads/cldr-48) | ~~[CLDR48](https://unicode.org/Public/cldr/48/)~~ | [Charts48](https://unicode.org/cldr/charts/dev) | [LDML48](https://www.unicode.org/reports/tr35/proposed.html) | [Δ48](https://unicode-org.atlassian.net/issues/?jql=project%20%3D%20CLDR%20AND%20status%20%3D%20Done%20AND%20resolution%20%3D%20Fixed%20AND%20fixversion%20%3D%2048%20ORDER%20BY%20priority%20DESC) | [release-48-beta3](https://github.com/unicode-org/cldr/releases/tag/release-48-beta3) | [ΔDtd48](https://www.unicode.org/cldr/charts/dev/supplemental/dtd_deltas.html) | [48.0.0-BETA3](https://github.com/unicode-org/cldr-json/releases/tag/48.0.0-BETA3)) |
 
 # BETA DRAFT
 
@@ -344,7 +344,7 @@ and feedback that the general practice for exact dates is to use Gregorian for p
 
 ## Known Issues
 
-- _None yet_
+- ISO 3166-2 subdivision codes for Iran changed in 2020, and there are not yet new equivalent stable codes. See [CLDR-19046][] for more details.
 
 ## Acknowledgments
 
@@ -374,6 +374,7 @@ For web pages with different views of CLDR data, see [http://cldr.unicode.org/in
 [CLDR-18894]: https://unicode-org.atlassian.net/browse/CLDR-18894
 [CLDR-18934]: https://unicode-org.atlassian.net/browse/CLDR-18934
 [CLDR-18956]: https://unicode-org.atlassian.net/browse/CLDR-18956
+[CLDR-19046]: https://unicode-org.atlassian.net/browse/CLDR-19046
 
 [Delta DTDs]: https://unicode.org/cldr/charts/48/supplemental/dtd_deltas.html
 [BCP47 Delta]: https://unicode.org/cldr/charts/48/delta/bcp47.html