Prevent terminating of tokens/contracts process

[vbaranov]

Motivation

Prevent terminating of tokens/contracts process

Request: GET /token-autocomplete?q=https%3A%2F%2Fcircles.garden%2Fprofile0x4625d7b6ba483734f629d2f2d95d6b589dba4cd3
** (exit) an exception was raised:
    ** (Postgrex.Error) ERROR 42601 (syntax_error) syntax error in tsquery: "https://circles.garden/profile0x4625d7b6ba483734f629d2f2d95d6b589dba4cd3:*"
        (ecto_sql 3.3.4) lib/ecto/adapters/sql.ex:612: Ecto.Adapters.SQL.raise_sql_call_error/1
        (ecto_sql 3.3.4) lib/ecto/adapters/sql.ex:545: Ecto.Adapters.SQL.execute/5
        (ecto 3.3.4) lib/ecto/repo/queryable.ex:192: Ecto.Repo.Queryable.execute/4
        (ecto 3.3.4) lib/ecto/repo/queryable.ex:17: Ecto.Repo.Queryable.all/3
        (block_scout_web 0.0.1) lib/block_scout_web/controllers/chain_controller.ex:101: BlockScoutWeb.ChainController.token_autocomplete/2
        (block_scout_web 0.0.1) lib/block_scout_web/controllers/chain_controller.ex:1: BlockScoutWeb.ChainController.action/2
        (block_scout_web 0.0.1) lib/block_scout_web/controllers/chain_controller.ex:1: BlockScoutWeb.ChainController.phoenix_controller_pipeline/2
        (phoenix 1.5.4) lib/phoenix/router.ex:352: Phoenix.Router.__call__/2

Changelog

Remove special symbols from a searching pattern before making a full-text search query.

Checklist for your Pull Request (PR)

• I added an entry to CHANGELOG.md with this PR
• If I added new functionality, I added tests covering it.
• If I fixed a bug, I added a regression test to prevent the bug from silently reappearing again.
• I checked whether I should update the docs and did so by submitting a PR to https://github.com/blockscout/docs
• If I added/changed/removed ENV var, I submitted a PR to https://github.com/blockscout/docs to update the list of env vars at https://github.com/blockscout/docs/blob/master/for-developers/information-and-settings/env-variables.md and I updated the version to master in the Version column. Changes will be reflected in this table: https://docs.blockscout.com/for-developers/information-and-settings/env-variables.
• If I add new indices into DB, I checked, that they are not redundant with PGHero or other tools

[coveralls]

Pull Request Test Coverage Report for Build 094d39375e22771b959892bf74b16d34d91bf243-PR-3375

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 6 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+2.9%) to 67.525%

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Files with Coverage Reduction	New Missed Lines	%
lib/block_scout_web/channels/address_channel.ex	2	36.96%
lib/block_scout_web/controllers/chain/market_history_chart_controller.ex	2	71.43%
lib/block_scout_web/notifier.ex	2	82.95%

Totals
Change from base Build eb124072b7f9969cb5f7a0e8f488f66f88da609f:	2.9%
Covered Lines:	2046
Relevant Lines:	3030

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💛 - Coveralls