chore(main): release bigframes 2.48.0

[release-please]

🤖 I have created a release beep boop

2.48.0 (2026-08-04)

Features

• bigframes: Transpiler supports more string ops (#17693) (7d2bc21)

Bug Fixes

• bump @angular/compiler, @angular/common, @angular/core, @angular/forms, @angular/platform-browser, @angular/router and @angular/compiler-cli in /packages/bigframes/bigframes/display/table_widget_angular (#17992) (346aaab)
• bump fast-uri from 3.1.4 to 3.1.5 in /packages/bigframes/bigframes/display/table_widget_angular (#17989) (3b3f3f4)
• bump ip-address and express-rate-limit in /packages/bigframes/bigframes/display/table_widget_angular (#17985) (02ed656)
• bump undici and @angular/build in /packages/bigframes/bigframes/display/table_widget_angular (#17986) (6938061)
• bump undici from 7.25.0 to 7.29.0 in /packages/bigframes/tests/js (#17987) (65a3571)

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