CI: Install adjusted antlr4-tools with better sonatype url

Author: amotl

.github/workflows/python.yml

@@ -63,7 +63,7 @@ jobs:
         # https://github.com/crate/cratedb-sqlparse/issues/170
         # https://github.com/antlr/antlr4-tools/issues/22
         # https://github.com/antlr/antlr4-tools/pull/23
-        uv pip install --upgrade 'antlr4-tools @ git+https://github.com/crate-workbench/antlr4-tools@search.maven.org'
+        uv pip install --upgrade 'antlr4-tools @ git+https://github.com/crate-workbench/antlr4-tools@better-sonatype-url'
 
     - name: Run linter and software tests
       run: |