rel: prep release v0.0.3-alpha (#57)

## Which problem is this PR solving?

- new release!

## Short description of the changes

- update version in `main.go` to `0.0.3-alpha`
- add changelog for new version
- update changelog for older tags to include `-alpha` suffix

CHANGELOG.md

@@ -1,6 +1,24 @@
 # Honeycomb eBPF Agent changelog
 
-## [0.0.2] - 2023-07-27
+## [0.0.3-alpha] - 2023-08-03
+
+### Enhancements
+
+- feat: Add more Kubernetes metadata (#46) | @pkanal
+- feat: Log and add agent, kernel and btfEnabled to events (#52) | @JamieDanielson
+- feat: Add vmlinux for kernel 5.15 for arm & amd (#26) | @MikeGoldsmith
+
+### Fixes
+
+- fix: fix source IP address (#43) | @JamieDanielson
+
+### Maintenance
+
+- maint: rename socket_event to tcp_event (#51) | @JamieDanielson
+- maint: update bpf header files to latest (#50) | @JamieDanielson
+- maint(deps): bump github.com/cilium/ebpf from 0.10.0 to 0.11.0 (#21)
+
+## [0.0.2-alpha] - 2023-07-27
 
 ### Enhancements
 
@@ -10,6 +28,6 @@
 
 - maint: add developing notes and comments (#41) | @JamieDanielson
 
-## [0.0.1] - 2023-07-18
+## [0.0.1-alpha] - 2023-07-18
 
 Initial release

main.go

@@ -12,7 +12,7 @@ import (
 	"k8s.io/client-go/rest"
 )
 
-const Version string = "0.0.2"
+const Version string = "0.0.3-alpha"
 const defaultDataset = "hny-ebpf-agent"
 const defaultEndpoint = "https://api.honeycomb.io"