Fix: Post excerpt overflows in 3 column layout of query loop

[Rishit30G]

What?

Closes #69588

Why?

This PR is necessary to avoid the overflow of text happening in post excerpt

How?

This PR adds the word-break: break-word and hyphens: auto to avoid the overflow of post excerpt

Testing Instructions

• Create a new post
• Add a title to the post and some long words in the editor like LoremIpsumLoremIpsumLoremIpsum
• Save the post
• Create a new post
• Add a Query Block to it with 3 column layout
• Save the post and notice on the frontend that the text overflow is no more

Screenshots or screencast

Before	After
https://github.com/user-attachments/assets/b2f9b308-9354-443f-b808-ee120b1c1ec8	https://github.com/user-attachments/assets/d4bd0a79-92d8-4fe0-a514-7ab718321e74

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[t-hamano]

Thanks for the PR!

I'm not sure that adding some styles to a specific block is an ideal approach. Let's take a broader perspective and discuss the ideal solution first. See #69588 (comment)

[t-hamano]

Closing this PR to investigate the ideal solution on #11956