[GSOC PATCH v2] doc: fix repo_config documentation reference

[SoutrikDas <valusoutrik@gmail.com>]

In MyFirstContribution.adoc, the link to the repo_config() 
documentation is invalid because the related documentation was moved 
to a different file.

Replace the path for the repo_config() documentation from
'Documentation/technical/api-config.h' to 'config.h'.

Signed-off-by: SoutrikDas <valusoutrik@gmail.com>
---
Changes from v1 : 
Corrected Documentation Spelling
Added .h after api-config
Changed Commit message to suit git's style
---
 Documentation/MyFirstContribution.adoc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/MyFirstContribution.adoc b/Documentation/MyFirstContribution.adoc
index f186dfbc89..92de476a7f 100644
--- a/Documentation/MyFirstContribution.adoc
+++ b/Documentation/MyFirstContribution.adoc
@@ -351,7 +351,7 @@ function body:
 apply standard precedence rules. `repo_config_get_string_tmp()` will look up
 a specific key ("user.name") and give you the value. There are a number of
 single-key lookup functions like this one; you can see them all (and more info
-about how to use `repo_config()`) in `Documentation/technical/api-config.adoc`.
+about how to use `repo_config()`) in `config.h`.
 
 You should see that the name printed matches the one you see when you run:
 
-- 
2.50.1 (Apple Git-155)