Fix job to update the runtime tag in dockerfile

[pankajastro]

closes: https://github.com/astronomer/astro-sdk/issues/2075 Sample PR: https://github.com/astronomer/astro-sdk/pull/2081

This PR fixes the CI job to update runtime image tag in dockerfiles

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (73d398a) 90.16% compared to head (53bba66) 90.23%. Report is 4 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2080 +/- ## ========================================== + Coverage 90.16% 90.23% +0.06% ========================================== Files 75 75 Lines 4323 4323 Branches 538 538 ========================================== + Hits 3898 3901 +3 + Misses 326 324 -2 + Partials 99 98 -1 ``` | [Flag](https://app.codecov.io/gh/astronomer/astro-sdk/pull/2080/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=astronomer) | Coverage Δ | | |---|---|---| | [PythonSDK](https://app.codecov.io/gh/astronomer/astro-sdk/pull/2080/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=astronomer) | `90.23% <ø> (+0.06%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=astronomer#carryforward-flags-in-the-pull-request-comment) to find out more.

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