fix links

Author: siliataider

blog/_posts/2025-06-06-uhi-for-root.md

@@ -11,7 +11,7 @@ Starting from **ROOT 6.36**, the Unified Histogram Interface (UHI) bridges the g
 ## What is UHI?
 
 The [Unified Histogram Interface (UHI)](https://uhi.readthedocs.io/en/latest/index.html) is a modernized API designed to standardize and simplify histogram operations in Python. 
-Fully implemented now in ROOT, UHI ensures that all ROOT histogram classes--derived from [TH1](https://root.cern.ch/doc/master/classTH1.html)--can leverage a consistent **intuitive** interface for Python developers, enhanced with a powerful set of functionalities like **slicing**, **indexing**, as well as native integration with popular Python **plotting** libraries, making ROOT histograms more versatile than ever.
+Fully implemented now in ROOT, UHI ensures that all ROOT histogram classes--derived from [TH1](https://root.cern/doc/master/classTH1.html)--can leverage a consistent **intuitive** interface for Python developers, enhanced with a powerful set of functionalities like **slicing**, **indexing**, as well as native integration with popular Python **plotting** libraries, making ROOT histograms more versatile than ever.
 
 ## How about a quick demo?
 
@@ -55,4 +55,4 @@ plt.show()
 
 ## Ready to Level Up Your Histogram Analysis?
 With UHI, ROOT histograms now offer Python developers an intuitive, modern, and powerful API.
-Check out the [ROOT UHI documentation](https://root.cern.ch/doc/master/group__uhi__docs.html) for more implementation details and examples!
+Check out the [ROOT UHI documentation](https://root.cern/doc/master/group__uhi__docs.html) for more implementation details and examples!