MariaDB 10.3

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CREATE TABLE articles( description VARCHAR(1000) )
INSERT INTO articles 
VALUES('To support this group, visit: https://example.com/give/81/29 The normal description continues here. There will be a lot of text below....')
UPDATE articles 
SET description= LTRIM(
                       SUBSTRING( description, 
                                - REGEXP_INSTR( REVERSE( description ) , '[0-9]' ) + 1 )
                 )         
                
SELECT * FROM articles


description


The normal description continues here. There will be a lot of text below....