[google_maps_flutter_ios_sdk9] Fix title in google maps sdk9 readme

[Hari-07]

Google maps sdk9 readme had a typo where it said sdk10 instead in the title

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Code Review

This pull request updates the header in the README.md file for the google_maps_flutter_ios_sdk9 package to correctly reference 'sdk9' instead of 'sdk10'. There are no review comments, and I have no feedback to provide.

[stuartmorgan-g]

Oops, I must have had the wrong tab open when I was editing the copy, and then later thought I just hadn't changed the title in sdk10 and fixed it there without realizing I'd changed it in the wrong place earlier. (I'm surprised Gemini didn't catch this in the autoreview; usually it's good at that kind of mistake.)

Replace this paragraph with a description of what this PR is changing or adding, and why. Consider including before/after screenshots.

Even a typo fix should have an actual PR description.

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This doesn't need an issue, and it's fine for project members to use judgement on following the checklist, but please don't check things you haven't done as it makes things confusing.

• I followed the version and CHANGELOG instructions, using semantic versioning and the repository CHANGELOG style, or I have commented below to indicate which documented exception this PR falls under1.

This wasn't done either, and is not optional; it's why CI is failing.

[Hari-07]

Yeah apologies, I thought it was a small enough change that I kinda just checked everything without reading it. Fixing now

[stuartmorgan-g]

This is still missing the actual version bump in pubspec.yaml.