Add option for bigger font-weight for columns block

[Acidham]

Please always provide the GitHub issue(s) your PR is for, as well as test URLs where your change can be observed (before and after):

Fix #551

Test URLs:

• Before: https://main--mammotome--hlxsites.hlx.page/us/en/about-us/news-media-category/a-culture-of-continuous-improvement
• After: https://551-variable-font-weights-column-blocks--mammotome--hlxsites.hlx.page/us/en/about-us/news-media-category/a-culture-of-continuous-improvement

[aem-code-sync[bot]]

Hello, I'm the AEM Code Sync Bot and I will run some test suites that validate the page speed. In case there are problems, just click the checkbox below to rerun the respective action.

• [ ] Re-run PSI Checks

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/us/en/about-us/news-media-category/a-culture-of-continuous-improvement

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/us/en/about-us/news-media-category/a-culture-of-continuous-improvement

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/us/en/about-us/news-media-category/a-culture-of-continuous-improvement

[aem-code-sync[bot]]

Page	Scores	Audits	Google
/us/en/about-us/news-media-category/a-culture-of-continuous-improvement