CLEANUP: Fix typos in the regex subsystem

Fix typos in the code comment of the regex subsystem.
diff --git a/src/regex.c b/src/regex.c
index 62c8e84..f3f74c3 100644
--- a/src/regex.c
+++ b/src/regex.c
@@ -193,7 +193,7 @@
 	 * value from a successful match is 1, indicating that just the first pair of
 	 * offsets has been set.
 	 *
-	 * It seems that this function returns 0 if it detect more matches than avalaible
+	 * It seems that this function returns 0 if it detects more matches than available
 	 * space in the matches array.
 	 */
 #ifdef USE_PCRE2
@@ -286,7 +286,7 @@
 	 * value from a successful match is 1, indicating that just the first pair of
 	 * offsets has been set.
 	 *
-	 * It seems that this function returns 0 if it detect more matches than avalaible
+	 * It seems that this function returns 0 if it detects more matches than available
 	 * space in the matches array.
 	 */
 #ifdef USE_PCRE2