Fix a couple of typos

One of them has been reported by Rajan Pandey, while I've bumped on the
other one.

Per #185.

Backpatch-through: 14

README.md

@@ -16,7 +16,7 @@ For more details, please see the various documentations available in the
 1. [Description](docs/description.md)
 1. [The hint table](docs/hint_table.md)
 1. [Installation](docs/installation.md)
-1. [Unistallation](docs/uninstallation.md)
+1. [Uninstallation](docs/uninstallation.md)
 1. [Details in hinting](docs/hint_details.md)
 1. [Errors](docs/errors.md)
 1. [Functional limitations](docs/functional_limitations.md)

docs/hint_table.md

@@ -162,5 +162,5 @@ The following GUC parameters affect the behavior of `pg_hint_plan`:
 | `pg_hint_plan.enable_hint` | True enables `pg_hint_plan`. | `on` |
 | `pg_hint_plan.enable_hint_table` | True enables hinting by table. | `off` |
 | `pg_hint_plan.parse_messages` | Specifies the log level of hint parse error.  Valid values are `error`, `warning`, `notice`, `info`, `log`, `debug`. | `INFO` |
-| `pg_hint_plan.debug_print` | Controls debug print and verbosity. Valid vaiues are `off`, `on`, `detailed` and `verbose`. | `off` |
+| `pg_hint_plan.debug_print` | Controls debug print and verbosity. Valid values are `off`, `on`, `detailed` and `verbose`. | `off` |
 | `pg_hint_plan.message_level` | Specifies message level of debug print. Valid values are `error`, `warning`, `notice`, `info`, `log`, `debug`. | `INFO` |

docs/locale/ja/LC_MESSAGES/hint_table.po

@@ -267,7 +267,7 @@ msgstr ""
 
 #: ../../hint_table.md 7334bdf8ba12417ea4341491f5d35c5c
 msgid ""
-"Controls debug print and verbosity. Valid vaiues are `off`, `on`, "
+"Controls debug print and verbosity. Valid values are `off`, `on`, "
 "`detailed` and `verbose`."
 msgstr ""