Creating new branches

Creating new branches (based on new org.freedesktop.Platform branches)

1. Bump branch, runtime-branch to new SDK branch; change extensions and append-path if necessary. https://github.com/flathub/org.flatpak.Builder.BaseApp/blob/f4138223f55ae4117cf47a71ea1b6152ee029a03/org.flatpak.Builder.BaseApp.json#L3-L13

2. Add new extension to https://github.com/flathub/org.flatpak.Builder.BaseApp/blob/f4138223f55ae4117cf47a71ea1b6152ee029a03/.github/workflows/ci.yml#L35

3. Create a test branch for https://github.com/flathub/org.flatpak.Builder and update the wheels in flatpak-builder-lint-deps.json to the Python version in new SDK No need to update anything else.

4. Change https://github.com/flathub/org.flatpak.Builder.BaseApp/blob/f4138223f55ae4117cf47a71ea1b6152ee029a03/.github/workflows/ci.yml#L52 to that test branch

5. Commit org.flatpak.Builder.BaseApp.json, .github/ci.yml and any other modified files, make a PR and start a test build.

6. If test build and smoketest are successful, create a new branch, branch/2x.08 and merge PR to it. (For maintainers)

7. Once the 2x.08 update for org.flatpak.Builder is merged, switch the test branch to master again in https://github.com/flathub/org.flatpak.Builder.BaseApp/blob/f4138223f55ae4117cf47a71ea1b6152ee029a03/.github/workflows/ci.yml#L52