Bump release from 5.0 to 5.1.

5.1 and 5.0 share the same ABI, so instead of cluttering the list even more, just bump to 5.1 entirely.

.github/workflows/build.yml

@@ -100,7 +100,7 @@ jobs:
       fail-fast: false
       matrix:
         target: [win64,linux64,linuxarm64]
-        variant: [gpl,lgpl,gpl 4.4,gpl 5.0,lgpl 4.4,lgpl 5.0,gpl-shared,lgpl-shared,gpl-shared 4.4,gpl-shared 5.0,lgpl-shared 4.4,lgpl-shared 5.0]
+        variant: [gpl,lgpl,gpl 4.4,gpl 5.1,lgpl 4.4,lgpl 5.1,gpl-shared,lgpl-shared,gpl-shared 4.4,gpl-shared 5.1,lgpl-shared 4.4,lgpl-shared 5.1]
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -141,7 +141,7 @@ jobs:
       fail-fast: false
       matrix:
         target: [win64,linux64,linuxarm64]
-        variant: [gpl,lgpl,gpl 4.4,gpl 5.0,lgpl 4.4,lgpl 5.0,gpl-shared,lgpl-shared,gpl-shared 4.4,gpl-shared 5.0,lgpl-shared 4.4,lgpl-shared 5.0]
+        variant: [gpl,lgpl,gpl 4.4,gpl 5.1,lgpl 4.4,lgpl 5.1,gpl-shared,lgpl-shared,gpl-shared 4.4,gpl-shared 5.1,lgpl-shared 4.4,lgpl-shared 5.1]
     steps:
       - name: Checkout
         uses: actions/checkout@v3

.github/workflows/pr.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         target: [win64,linux64,linuxarm64]
-        variant: [gpl,lgpl,gpl 4.4,gpl 5.0,lgpl 4.4,lgpl 5.0,gpl-shared,lgpl-shared,gpl-shared 4.4,gpl-shared 5.0,lgpl-shared 4.4,lgpl-shared 5.0]
+        variant: [gpl,lgpl,gpl 4.4,gpl 5.1,lgpl 4.4,lgpl 5.1,gpl-shared,lgpl-shared,gpl-shared 4.4,gpl-shared 5.1,lgpl-shared 4.4,lgpl-shared 5.1]
     steps:
       - name: Checkout
         uses: actions/checkout@v3

addins/5.1.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+GIT_BRANCH="release/5.1"