chore: prepare av-tools 0.3.0 release

README.md

@@ -8,8 +8,8 @@ telemetry, runtime CDN, remote-media fetch or third-party script.
 It is also a Toolbox SDK application. The same static build runs directly or
 under Toolbox Portal with shared shell, theme, help and app switching.
 
-> **Release status:** 0.2.1 is licensed GPL-3.0-or-later. Its canonical
-> release consists of the exact reviewed `v0.2.1` source, production
+> **Release status:** 0.3.0 is licensed GPL-3.0-or-later. Its canonical
+> release consists of the exact reviewed `v0.3.0` source, production
 > ZIP/checksum and Corresponding Source bundle published together. See
 > [Licensing](#licensing).
 
@@ -23,7 +23,7 @@ Two workflows keep the product intentionally smaller than a nonlinear editor:
 - **Edit:** a media bin and sequential non-overlapping clip timeline with
   non-destructive settings, one export at a time.
 
-The 0.2 release covers typed/capability-gated conversion and remux,
+The 0.3 release covers typed/capability-gated conversion and remux,
 fast/accurate trim, split, compatible/normalized concatenate, reorder, crop,
 resize, frame-rate change, audio extraction/stream removal, waveform,
 peak/two-pass loudness normalization, gain, audio/video fades, metadata,