fix confignet README (dialer timeout) (#11686)

#### Description
Updates  dialer timeout section documentation in confignet README 

#### Link to tracking issue
Fixes #11685

.chloggen/confignet-readme.yaml

@@ -0,0 +1,25 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
+component: all
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Updates dialer timeout section documentation in confignet README
+
+# One or more tracking issues or pull requests related to the change
+issues: [11685]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

config/confignet/README.md

@@ -13,7 +13,8 @@ leverage network configuration to set connection and transport information.
 - `transport`: Known protocols are "tcp", "tcp4" (IPv4-only), "tcp6"
   (IPv6-only), "udp", "udp4" (IPv4-only), "udp6" (IPv6-only), "ip", "ip4"
   (IPv4-only), "ip6" (IPv6-only), "unix", "unixgram" and "unixpacket".
-- `dialer_timeout`: DialerTimeout is the maximum amount of time a dial will wait for a connect to complete. The default is no timeout.
+- `dialer`: Dialer configuration
+  - `timeout`: Dialer timeout is the maximum amount of time a dial will wait for a connect to complete. The default is no timeout.
 
 Note that for TCP receivers only the `endpoint` configuration setting is
 required.