Fix changelog dates (#1220)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>

ghcide/CHANGELOG.md

@@ -1,7 +1,7 @@
-### 0.7.2 (2020-01-14)
+### 0.7.2 (2021-01-14)
 * Expose shakeOptions used - (Pepe Iborra)
 
-### 0.7.1 (2020-01-13)
+### 0.7.1 (2021-01-13)
 * Fix sticky diagnostics bug (#1188) - (Pepe Iborra)
 * Use completionSnippetsOn flag (#1195) - (Yuya Kono)
 * Update tested-with GHC in cabal config - (jneira)
@@ -14,7 +14,7 @@
 * Update links to issues/PRs in ghcide tests. (#1142) - (Peter Wicks Stringfield)
 * fix suggestAddTypeAnnotation regex (#760) - (Kostas Dermentzis)
 
-### 0.7.0 (2020-01-03)
+### 0.7.0 (2021-01-03)
 * Ghcide now loads HLS plugins internally - (Pepe Iborra)
 * Retry a failed cradle if the cradle descriptor changes (#762) - (Pepe Iborra)
 * Fix extend imports regression (#769) - (Pepe Iborra)