CI: revert to beta3 because rc1 breaks headless

.github/workflows/gdext.yml

@@ -7,7 +7,7 @@ on:
 
 
 env:
-  vcpkg_tag: 943c5ef1c8f6b5e6ced092b242c8299caae2ff01 # 2024.04.26
+  vcpkg_tag: 1de2026f28ead93ff1773e6e680387643e914ea1 # 2024.07.12
 
 jobs:
   windows:
@@ -286,7 +286,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-14, windows-latest]
-        gdver: ["4.2.2", "4.3.0-rc.1"]
+        gdver: ["4.2.2", "4.3.0-beta.3"]
         include:
           - os: ubuntu-latest
             name: 🐧GdsGameProject
@@ -367,7 +367,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-14, windows-latest]
-        gdver: ["4.2.2", "4.3.0-rc.1"]
+        gdver: ["4.2.2", "4.3.0-beta.3"]
         include:
           - os: ubuntu-latest
             name: 🐧🧪GDScript
@@ -415,7 +415,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-14, windows-latest]
-        gdver: ["4.2.2", "4.3.0-rc.1"]
+        gdver: ["4.2.2", "4.3.0-beta.3"]
         include:
           - os: ubuntu-latest
             name: 🐧🧪C#

.github/workflows/godot.yml

@@ -10,7 +10,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-14, windows-latest]
-        gdver: ["4.2.2", "4.3.0-rc.1"]
+        gdver: ["4.2.2", "4.3.0-beta.3"]
         include:
           - os: ubuntu-latest
             name: 🐧🧪C# Only