fix: handle missing m:t text in OMML math runs (fixes #1512)#1668

octo-patch wants to merge 3 commits intomicrosoft:mainmicrosoft/markitdown:mainfrom

octo-patch:fix/issue-1512-docx-math-missingocto-patch/markitdown:fix/issue-1512-docx-math-missingCopy head branch name to clipboard