readme, ci: remove older zig version

AFAIC 0.14.0 is effectively a breaking change

Author: gerwin3

.github/workflows/ci.yaml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        zig-version: ["0.12.0", "0.12.1", "0.13.0", "0.14.0"]
+        zig-version: ["0.14.0"]
         os: [ubuntu-latest, macos-latest, windows-latest]
 
     runs-on: ${{ matrix.os }}

README.md

@@ -16,9 +16,6 @@ A wrapper around the NVIDIA Video Codec (NVENC and NVDEC) for Zig.
 
 | Zig version | Status |
 |-------------|--------|
-| 0.12.0      | ✅     |
-| 0.12.1      | ✅     |
-| 0.13.0      | ✅     |
 | 0.14.0      | ✅     |
 
 This library requires at least: