Fix relative link to use .md file extension

Signed-off-by: Chance Feick <cfeick@gitlab.com>

docs/querying/basics.md

@@ -35,7 +35,7 @@ vector is the only type that can be directly graphed.
 _Notes about the experimental native histograms:_
 
 * Ingesting native histograms has to be enabled via a [feature
-  flag](../feature_flags/#native-histograms).
+  flag](../feature_flags.md#native-histograms).
 * Once native histograms have been ingested into the TSDB (and even after
   disabling the feature flag again), both instant vectors and range vectors may
   now contain samples that aren't simple floating point numbers (float samples)

docs/querying/functions.md

@@ -14,7 +14,7 @@ vector, which if not provided it will default to the value of the expression
 _Notes about the experimental native histograms:_
 
 * Ingesting native histograms has to be enabled via a [feature
-  flag](../feature_flags/#native-histograms). As long as no native histograms
+  flag](../feature_flags.md#native-histograms). As long as no native histograms
   have been ingested into the TSDB, all functions will behave as usual.
 * Functions that do not explicitly mention native histograms in their
   documentation (see below) effectively treat a native histogram as a float