We really don't know yet if (and when) a booster shot would be needed, and if we would need an extra shot of the same vaccine (to help with immune escape) or a tweaked version (for resistant variants). So far research suggests that we're good, but this isn't something that's set in stone.
If you're a vaccine maker, it's a good idea to have something ready if it turns out that a booster is needed. If you're in charge of public health, it's a good idea to plan for that possibility. That doesn't make it the plan yet.
Also note that you're looking at a press release. Scientific press releases take the information from the article, summarize it by giving the main achievement, removing any caveats, and otherwise presenting it in the best possible light possible. There are press releases like that for vaccines that were later shown to be ineffective, because at that point they were promising.
If you're a vaccine maker, it's a good idea to have something ready if it turns out that a booster is needed. If you're in charge of public health, it's a good idea to plan for that possibility. That doesn't make it the plan yet.
Also note that you're looking at a press release. Scientific press releases take the information from the article, summarize it by giving the main achievement, removing any caveats, and otherwise presenting it in the best possible light possible. There are press releases like that for vaccines that were later shown to be ineffective, because at that point they were promising.