Merge pull request #9828 from Icinga/release.md

Replace `RELEASE.md' with issue template

.github/ISSUE_TEMPLATE/release.md

@@ -0,0 +1,48 @@
+---
+name: '[INTERNAL] Release'
+about: Release a version
+title: 'Release Version v$version'
+labels: ''
+assignees: ''
+
+---
+
+# Release Workflow
+
+- [ ] Check that the `.mailmap` and `AUTHORS` files are up to date
+- [ ] Update `ICINGA2_VERSION`
+- [ ] Update bundled Windows dependencies
+- [ ] Update `CHANGELOG.md`
+- [ ] Create and push a signed tag for the version
+- [ ] Build and release DEB and RPM packages
+- [ ] Build and release Windows packages
+- [ ] Create release on GitHub
+- [ ] Update public docs
+- [ ] Announce release
+
+## Update Bundled Windows Dependencies
+
+### Update packages.icinga.com
+
+Add the latest Boost and OpenSSL versions to
+https://packages.icinga.com/windows/dependencies/, e.g.:
+
+* https://master.dl.sourceforge.net/project/boost/boost-binaries/1.82.0/boost_1_82_0-msvc-14.2-64.exe
+* https://master.dl.sourceforge.net/project/boost/boost-binaries/1.82.0/boost_1_82_0-msvc-14.2-32.exe
+* https://slproweb.com/download/Win64OpenSSL-3_0_9.exe
+* https://slproweb.com/download/Win32OpenSSL-3_0_9.exe
+
+### Update Build Server, CI/CD and Documentation
+
+* [doc/21-development.md](doc/21-development.md)
+* [doc/win-dev.ps1](doc/win-dev.ps1) (also affects CI/CD)
+* [tools/win32/configure.ps1](tools/win32/configure.ps1)
+* [tools/win32/configure-dev.ps1](tools/win32/configure-dev.ps1)
+
+### Re-provision Build Server
+
+Even if there aren't any new releases of dependencies with versions
+hardcoded in the repos and files listed above (Boost, OpenSSL).
+There may be new build versions of other dependencies (VS, MSVC).
+Our GitHub actions (tests) use the latest ones automatically,
+but the GitLab runner (release packages) doesn't.