add missing keys

- adding missing `key` for the tag templates

Author: SamusElderg

src/lib/ContestTile/CompactTemplate.tsx

@@ -170,6 +170,7 @@ const IsContest = ({title, isDarkTile = true, contestData, sponsorUrl, sponsorIm
         {languages
           && languages.length > 0
           && languages.map((language) => <Tag
+            key={language}
             variant={isDarkTile ? TagVariant.DEFAULT : TagVariant.WHITE_OUTLINE}
             label={language}
             size={TagSize.NARROW}
@@ -243,6 +244,7 @@ const IsBounty = ({title, isDarkTile = true, bountyData, sponsorUrl, sponsorImag
         {languages
           && languages.length > 0
           && languages.map((language) => <Tag
+          key={language}
           variant={isDarkTile ? TagVariant.DEFAULT : TagVariant.WHITE_OUTLINE}
           label={language}
           size={TagSize.NARROW} />

src/lib/ContestTile/DefaultTemplate.tsx

@@ -330,6 +330,7 @@ function IsContest({
                         {languages
                           && languages.length > 0
                           && languages.map((language) => <Tag
+                          key={language}
                           variant={isDarkTile ? TagVariant.DEFAULT : TagVariant.WHITE_OUTLINE}
                           label={language}
                           size={TagSize.NARROW} />
@@ -459,6 +460,7 @@ function IsBounty({
                   {languages
                     && languages.length > 0
                     && languages.map((language) => <Tag
+                    key={language}
                     variant={isDarkTile ? TagVariant.DEFAULT : TagVariant.WHITE_OUTLINE}
                     label={language}
                     size={TagSize.NARROW} />