chore: update compatibility matrix (#1100)

The compatibility matrix hadn't need kept up to date. This updates
the matrix.

Signed-off-by: Richard Case <richard.case@outlook.com>

Author: richardcase

README.md

@@ -56,6 +56,8 @@ The table below shows you which versions of Firecracker are compatible with Flin
 
 | Flintlock         | Firecracker                      | Cloud Hypervisor  |
 | ----------------- | -------------------------------- | ----------------- |
+| v0.9.x            | Official v1.11+                  | v41.0             |
+| v0.8.x            | Official v1.10+                  | v41.0             |
 | v0.7.0            | Official v1.10+                  | v41.0             |
 | v0.6.0            | Official v1.0+ or v1.0.0-macvtap | v26.0             |
 | v0.5.0            | Official v1.0+ or v1.0.0-macvtap | v26.0             |