Update to GitVersion 5.12.0

Author: pascalberger

.appveyor.yml

@@ -18,7 +18,6 @@ install:
   - ps: $env:DOTNET_INSTALL_DIR = "$pwd\.dotnetsdk"
   - ps: mkdir $env:DOTNET_INSTALL_DIR -Force | Out-Null
   - ps: Invoke-WebRequest -Uri "https://dotnet.microsoft.com/download/dotnet/scripts/v1/dotnet-install.ps1" -OutFile "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1"
-  - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Version 5.0.408 -InstallDir $env:DOTNET_INSTALL_DIR'
   - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Version 6.0.425 -InstallDir $env:DOTNET_INSTALL_DIR'
   - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Version 7.0.409 -InstallDir $env:DOTNET_INSTALL_DIR'
   - ps: '& "$($env:DOTNET_INSTALL_DIR)/dotnet-install.ps1" -Version 8.0.402 -InstallDir $env:DOTNET_INSTALL_DIR'

.azuredevops/pipelines/templates/steps/install-net5.yml

@@ -1,8 +1,6 @@
 # Installs required .NET SDKs for building the solution.
 
 steps:
-  # .NET 5 required for GitVersion
-  - template: install-net5.yml
   - template: install-net6.yml
   - template: install-net7.yml
   - template: install-net8.yml

.azuredevops/pipelines/templates/steps/install-required-dotnet-versions-for-building.yml

@@ -24,7 +24,8 @@ BuildParameters.PrintParameters(Context);
 
 ToolSettings.SetToolPreprocessorDirectives(
     gitReleaseManagerGlobalTool: "#tool dotnet:?package=GitReleaseManager.Tool&version=0.17.0",
-    nugetTool: "#tool nuget:?package=NuGet.CommandLine&version=6.9.1"
+    nugetTool: "#tool nuget:?package=NuGet.CommandLine&version=6.9.1",
+    gitVersionGlobalTool: "#tool dotnet:?package=GitVersion.Tool&version=5.12.0"
 );
 
 ToolSettings.SetToolSettings(