Apply suggestions from code review

Co-authored-by: Edmo Vamerlatti Costa <[email protected]>

.chloggen/ottl-timestamp.yaml

@@ -7,7 +7,7 @@ change_type: enhancement
 component: pkg/ottl
 
 # A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
-note: "Introduce new FormatTime() converter function."
+note: "Add the `FormatTime` function to convert `time.Time` values to human-readable strings"
 
 # Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
 issues: [36870]
@@ -24,4 +24,4 @@ subtext:
 # 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: []
+change_logs: [user]

pkg/ottl/ottlfuncs/README.md

@@ -1966,13 +1966,13 @@ Examples:
 
 `FormatTime(time, format)`
 
-The `FormatTime` Converter takes a `time.Time` and converts it to a human readable string representations of the time according to the specidied format.
+The `FormatTime` Converter takes a `time.Time` and converts it to a human-readable string representation of the time according to the specified format.
 
 `time` is `time.Time`. If `time` is another type an error is returned. `format` is a string.
 
-If `format` is nil, an error is returned. The parser used is the parser at [internal/coreinternal/parser](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/internal/coreinternal/timeutils). If `format` does not follow the parsing rules used by this parser, an error is returned.
+If either `time` or `format` are nil, an error is returned. The parser used is the parser at [internal/coreinternal/parser](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/internal/coreinternal/timeutils). If `format` does not follow the parsing rules used by this parser, an error is returned.
 
-`format` denotes a textual and human readable representation of the resulting time value formatted according to ctime-like format string. It follows [standard Go Layout formatting](https://pkg.go.dev/time#pkg-constants) with few additional substitutes:
+`format` denotes a human-readable textual representation of the resulting time value formatted according to ctime-like format string. It follows [standard Go Layout formatting](https://pkg.go.dev/time#pkg-constants) with few additional substitutes:
 | substitution | description | examples |
 |-----|-----|-----|
 |`%Y` | Year as a zero-padded number | 0001, 0002, ..., 2019, 2020, ..., 9999 |