ICU-21834 Bad link to build in ICU FAQs

Signed-off-by: David de Hilster <[email protected]>

Author: dehilsterlexis

docs/userguide/icu4c/faq.md

@@ -42,7 +42,7 @@ versions of ICU, but we will assist in building other versions from source.
 **Why don't you provide project files for my MSVC version (MSVC 2008, etc)?**
 
 You can use the Cygwin build environment to build ICU from source against the
-MSVC compiler. See the [Building ICU4C](./icu4c/build) page.
+MSVC compiler. See the [Building ICU4C](./build) page.
 
 #### How do I install the binary versions of ICU?
 
@@ -69,7 +69,7 @@ MSVC compiler. See the [Building ICU4C](./icu4c/build) page.
 
 #### Can you help me build ICU4C for ...
 
-We can try ... make sure you read the [Building ICU4C](./icu4c/build) section and also the [ICU
+We can try ... make sure you read the [Building ICU4C](./build) section and also the [ICU
 Data](../icudata.md) section. You might also [searching the icu-support
 archives](https://icu.unicode.org/contacts), and then posting a question
 there. Additionally, sites such as
@@ -146,7 +146,7 @@ upgrade-friendly.
 
 #### How do I build ICU?
 
-See the [Building ICU4C](./icu4c/build) section.
+See the [Building ICU4C](./build) section.
 
 #### How do I get 32- or 64-bit versions of the ICU libraries?