chore: Bump version to 0.96.3

Update version number across all files:
- src/lib_ccx/lib_ccx.h (main version define)
- linux/configure.ac, mac/configure.ac (autoconf)
- OpenBSD/Makefile
- package_creators/ (PKGBUILD, ccextractor.spec, debian.sh)
- packaging/winget/ (all yaml manifests)
- packaging/chocolatey/ (nuspec and install script)

Note: Checksums in winget/chocolatey will need to be updated
when the actual release MSI is built.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package_creators/PKGBUILD

@@ -1,5 +1,5 @@
 pkgname=ccextractor
-pkgver=0.96
+pkgver=0.96.3
 pkgrel=1
 pkgdesc="A closed captions and teletext subtitles extractor for video streams."
 arch=('i686' 'x86_64')

package_creators/ccextractor.spec

@@ -1,5 +1,5 @@
 Name: ccextractor
-Version: 0.96
+Version: 0.96.3
 Release: 1
 Summary: A closed captions and teletext subtitles extractor for video streams.
 Group: Applications/Internet

package_creators/debian.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 TYPE="debian"   # can be one of 'slackware', 'debian', 'rpm'
 PROGRAM_NAME="ccextractor"
-VERSION="0.96"
+VERSION="0.96.3"
 RELEASE="1"
 LICENSE="GPL-2.0"
 MAINTAINER="carlos@ccextractor.org"