[*] fix typos in docs and source comments (#1204)

- Fix "publicating" → "publishing" in log broker hook comment
- Fix "deinitions" → "definitions" in config DB bootstrap doc
- Fix "Exucute" → "Execute" in v2 to v3 migration guide
- Remove stray single quote from connection string in Docker installation doc

Author: Ahmed-Idani

docs/howto/config_db_bootstrap.md

@@ -59,7 +59,7 @@ pgwatch --sink=postgresql://pgwatch:pgwatchadmin@localhost/measurements config i
 ## Usage
 
 You can now configure pgwatch to use the `pgwatch` database as the configuration database for storing monitored sources,
-metric deinitions and presets.
+metric definitions and presets.
 
 ```terminal
 $ pgwatch --sources=postgresql://pgwatch:pgwatchadmin@localhost/pgwatch --sink=postgresql://[email protected]/measurements

docs/howto/migrate_v2_to_v3.md

@@ -73,7 +73,7 @@ from pgwatch2.monitored_db;
     You may skip this step if you have not created custom metrics or presets.
     All built-in metrics and presets are already included in pgwatch3.
 
-Exucute the following queries to migrate the metrics and presets:
+Execute the following queries to migrate the metrics and presets:
 
 ```sql
 insert into pgwatch.preset

docs/tutorial/docker_installation.md

@@ -220,7 +220,7 @@ Source file `sources.yaml` in the same directory:
 
 ```yaml
 - name: demo
-  conn_str: postgresql://pgwatch:pgwatchadmin@postgres/pgwatch'
+  conn_str: postgresql://pgwatch:pgwatchadmin@postgres/pgwatch
   preset_metrics: exhaustive
   is_enabled: true
   group: default

internal/log/log_broker_hook.go

@@ -15,7 +15,7 @@ type MessageType string
 // MessageChanType represents the format of the message channel
 type MessageChanType chan MessageType
 
-// BrokerHook is the implementation of the logrus hook for publicating logs to subscribers
+// BrokerHook is the implementation of the logrus hook for publishing logs to subscribers
 type BrokerHook struct {
 	highLoadTimeout time.Duration     // wait this amount of time before skip log entry
 	subscribers     []MessageChanType //