LinkFix: cpp-docs-pr (2022-03)

Author: Christopher McClister

docs/cpp/index.yml

@@ -36,7 +36,7 @@ landingContent:
       - linkListType: video
         links:
           - text: "Learn C++ - A general purpose language and library"
-            url: https://docs.microsoft.com/shows/cplusplus-language-library
+            url: /shows/cplusplus-language-library
       - linkListType: learn
         links:
           - text: Welcome back to C++ - Modern C++
@@ -117,4 +117,4 @@ landingContent:
           - text: Regular expressions
             url: ../standard-library/regular-expressions-cpp.md
           - text: File system navigation
-            url: ../standard-library/file-system-navigation.md
+            url: ../standard-library/file-system-navigation.md