Update NOT_ALLOWED_SSR_EXTENSIONS_REGEX to specifically look for a dot before the file extension

[haelbichalex]

Short Description and Why It's Useful

The current regex also matches for urls ending with for example ico, without the dot:
https://www.regextester.com/?fam=114754

The updated one checks if there's a . before the given file extension list:
https://www.regextester.com/?fam=114755

In my case I got a 404 page result because my path was something like /testico.

Which Environment This Relates To

Check your case. In case of any doubts please read about Release Cycle

• Test version (https://test.storefrontcloud.io) - this is a new feature or improvement for Vue Storefront. I've created branch from develop branch and want to merge it back to develop
• RC version (https://next.storefrontcloud.io) - this is a stabilisation fix for Release Candidate of Vue Storefront. I've created branch from release branch and want to merge it back to release
• Stable version (https://demo.storefrontcloud.io) - this is an important fix for current stable version. I've created branch from hotfix or master branch and want to merge it back to hotfix

Upgrade Notes and Changelog

• No upgrade steps required (100% backward compatibility and no breaking changes)
• I've updated the Upgrade notes and Changelog on how to port existing Vue Storefront sites with this new feature

IMPORTANT NOTICE - Remember to update CHANGELOG.md with description of your change

Contribution and Currently Important Rules Acceptance

• I read and followed contribution rules

[andrzejewsky]

@haelbichalex Thanks! please just update the changelog and it's ready to be merged in.

[haelbichalex]

@andrzejewsky Done 👍