[DOCS] Use "Bootstrap" instead of "Twitter Bootstrap" in EXT:form documentation

Twitter made the CSS framework Open Source in 2011, since then it is called only "Bootstrap".

Resolves: #101840
Releases: main, 12.4, 11.5
Change-Id: I05c7d9ce3a197cb61058a5582918935d6720e371
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/80838


Reviewed-by: Georg Ringer <georg.ringer@gmail.com>
Tested-by: core-ci <typo3@b13.com>
Tested-by: Georg Ringer <georg.ringer@gmail.com>

typo3/sysext/form/Documentation/I/Concepts/FormEditor/Index.rst

@@ -93,8 +93,8 @@ displays the form elements in two different modes:
   the frontend ('nearly' since you have to make sure that your frontend CSS
   is also loaded in the backend in order to get the exact preview).
 
-Per default, the frontend templates of EXT:form are based on Twitter
-Bootstrap. Since the backend of TYPO3 CMS also depends on this CSS framework,
+Per default, the frontend templates of EXT:form are based on `Bootstrap`_.
+Since the backend of TYPO3 CMS also depends on this CSS framework,
 the corresponding CSS files are already loaded in the backend context.
 Nevertheless, certain parts of the CSS were overridden and extended in order
 to meet the specific needs of the TYPO3 backend. Thus, the frontend preview
@@ -112,6 +112,8 @@ till it suits your needs.
 
 For more information, read the following chapter: ':ref:`Common abstract view form element templates<apireference-formeditor-stage-commonabstractformelementtemplates>`'.
 
+.. _Bootstrap: https://getbootstrap.com/
+
 
 .. _concepts-formeditor-inspector:
 

typo3/sysext/form/Documentation/I/Concepts/FrontendRendering/Index.rst

@@ -13,7 +13,9 @@ Frontend rendering
 Templates
 =========
 
-The Fluid templates of the form framework are based on Twitter Bootstrap.
+The Fluid templates of the form framework are based on `Bootstrap`_.
+
+.. _Bootstrap: https://getbootstrap.com/
 
 
 .. _concepts-frontendrendering-templates-customtemplates: